diff --git a/src/c_wrapper/command_queue.cpp b/src/c_wrapper/command_queue.cpp
index 4e2ee733a814948a14e7159a1263d154fff684e5..1f0eb1e619812fdc301cd6478620a643b582004e 100644
--- a/src/c_wrapper/command_queue.cpp
+++ b/src/c_wrapper/command_queue.cpp
@@ -6,6 +6,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_command_queue>;
+
 command_queue::~command_queue()
 {
     pyopencl_call_guarded_cleanup(clReleaseCommandQueue, this);
diff --git a/src/c_wrapper/command_queue.h b/src/c_wrapper/command_queue.h
index d7fcd08c9aefc8d77c1a17abebb7896903148c27..4ad5450a3efb758bba25cc9e64f9f2744e217ef7 100644
--- a/src/c_wrapper/command_queue.h
+++ b/src/c_wrapper/command_queue.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ command_queue
 
+extern template class clobj<cl_command_queue>;
+
 class command_queue : public clobj<cl_command_queue> {
 public:
     PYOPENCL_DEF_CL_CLASS(COMMAND_QUEUE);
diff --git a/src/c_wrapper/context.cpp b/src/c_wrapper/context.cpp
index 9b16c87c30a69d7657220c1ecf53586a536e0384..cd6e49ab6aa946d5c1815a7785f740d6d8cbc552 100644
--- a/src/c_wrapper/context.cpp
+++ b/src/c_wrapper/context.cpp
@@ -5,6 +5,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_context>;
+
 context::~context()
 {
     pyopencl_call_guarded_cleanup(clReleaseContext, this);
diff --git a/src/c_wrapper/context.h b/src/c_wrapper/context.h
index 74a108a545ac660de62f583190c902394b50d0a2..44ffc92ad91ff1bc9983e7eb07334b3d23b6eb00 100644
--- a/src/c_wrapper/context.h
+++ b/src/c_wrapper/context.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ context
 
+extern template class clobj<cl_context>;
+
 class context : public clobj<cl_context> {
 public:
     PYOPENCL_DEF_CL_CLASS(CONTEXT);
diff --git a/src/c_wrapper/device.cpp b/src/c_wrapper/device.cpp
index 495c215201a9b419e0b45d9c878f1bb75fe82ef9..54d1b7de4d16b149ea8b992cccdc7a974e3e5f35 100644
--- a/src/c_wrapper/device.cpp
+++ b/src/c_wrapper/device.cpp
@@ -3,6 +3,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_device_id>;
+
 device::~device()
 {
     if (false) {
diff --git a/src/c_wrapper/device.h b/src/c_wrapper/device.h
index 9e7ffd5ee76bea049e4e251a30add8ea7ca996ec..402461eb945d35421713a50cf62c6de132c573a4 100644
--- a/src/c_wrapper/device.h
+++ b/src/c_wrapper/device.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ device
 
+extern template class clobj<cl_device_id>;
+
 class device : public clobj<cl_device_id> {
 public:
     PYOPENCL_DEF_CL_CLASS(DEVICE);
diff --git a/src/c_wrapper/event.cpp b/src/c_wrapper/event.cpp
index 8dffa034a7a523d4483c073403919999a3999c3f..d7373af4fe13b2e108233b914c65bceb9e6678d0 100644
--- a/src/c_wrapper/event.cpp
+++ b/src/c_wrapper/event.cpp
@@ -5,6 +5,9 @@
 #include "pyhelper.h"
 
 namespace pyopencl {
+
+template class clobj<cl_event>;
+
 #if PYOPENCL_CL_VERSION >= 0x1010
 class event_callback {
     std::function<void(cl_int)> m_func;
diff --git a/src/c_wrapper/event.h b/src/c_wrapper/event.h
index 57517e2fca959769c801296352e86ba810afe8e2..7f3d6759a28d557d877f70e6225430cc6f7ac3dc 100644
--- a/src/c_wrapper/event.h
+++ b/src/c_wrapper/event.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ event
 
+extern template class clobj<cl_event>;
+
 class event : public clobj<cl_event> {
 public:
     PYOPENCL_DEF_CL_CLASS(EVENT);
diff --git a/src/c_wrapper/kernel.cpp b/src/c_wrapper/kernel.cpp
index b7f55ecb9310fc5742b28ed8ccb0ba16d4a62a03..5f9555e199c03c1ab829488d9b930cc804872d23 100644
--- a/src/c_wrapper/kernel.cpp
+++ b/src/c_wrapper/kernel.cpp
@@ -10,6 +10,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_kernel>;
+
 kernel::~kernel()
 {
     pyopencl_call_guarded_cleanup(clReleaseKernel, this);
diff --git a/src/c_wrapper/kernel.h b/src/c_wrapper/kernel.h
index 5c52bdccceac40981a1db525fcb0f33321a933d2..5029d0c335c8cb245625195c01f084826a16a278 100644
--- a/src/c_wrapper/kernel.h
+++ b/src/c_wrapper/kernel.h
@@ -9,6 +9,8 @@ class device;
 
 // {{{ kernel
 
+extern template class clobj<cl_kernel>;
+
 class kernel : public clobj<cl_kernel> {
 public:
     PYOPENCL_DEF_CL_CLASS(KERNEL);
diff --git a/src/c_wrapper/memory_map.cpp b/src/c_wrapper/memory_map.cpp
index 3826074ca02e3e0d5d959b466c5e985ab2667e8b..2dbbe02b913a8b888532fa19f90aba8924c203fb 100644
--- a/src/c_wrapper/memory_map.cpp
+++ b/src/c_wrapper/memory_map.cpp
@@ -6,6 +6,8 @@
 
 namespace pyopencl {
 
+template class clobj<void*>;
+
 memory_map::~memory_map()
 {
     if (!m_valid.exchange(false))
diff --git a/src/c_wrapper/memory_map.h b/src/c_wrapper/memory_map.h
index 6c3d6c8dca02d22f3bbcdea9c601b6068f9cc585..85d90917589e1e744eda976e2b0239f3bff0de4e 100644
--- a/src/c_wrapper/memory_map.h
+++ b/src/c_wrapper/memory_map.h
@@ -11,6 +11,8 @@ class event;
 
 // {{{ memory_map
 
+extern template class clobj<void*>;
+
 class memory_map : public clobj<void*> {
 private:
     mutable volatile std::atomic_bool m_valid;
diff --git a/src/c_wrapper/memory_object.cpp b/src/c_wrapper/memory_object.cpp
index a6945b2107c0290942d91189e32d8749a91237a5..b2f0f02d8dcadd933f8763afbc9975cdaf1cfceb 100644
--- a/src/c_wrapper/memory_object.cpp
+++ b/src/c_wrapper/memory_object.cpp
@@ -4,6 +4,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_mem>;
+
 generic_info
 memory_object::get_info(cl_uint param_name) const
 {
diff --git a/src/c_wrapper/memory_object.h b/src/c_wrapper/memory_object.h
index b9eb25fb5dd58a978d544a53cc02571ffd59c51c..5f1bb91b6346c79eb563676a0b61ce3322d8e62f 100644
--- a/src/c_wrapper/memory_object.h
+++ b/src/c_wrapper/memory_object.h
@@ -8,6 +8,8 @@ namespace pyopencl {
 
 // {{{ memory_object
 
+extern template class clobj<cl_mem>;
+
 class memory_object : public clobj<cl_mem> {
 private:
     mutable volatile std::atomic_bool m_valid;
diff --git a/src/c_wrapper/platform.cpp b/src/c_wrapper/platform.cpp
index dbb6e096fc5a3be11ed62c34f8583f4911e7b09b..b4b993e90f03bbb3431e1de6d96ed080021c5b03 100644
--- a/src/c_wrapper/platform.cpp
+++ b/src/c_wrapper/platform.cpp
@@ -4,6 +4,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_platform_id>;
+
 generic_info
 platform::get_info(cl_uint param_name) const
 {
diff --git a/src/c_wrapper/platform.h b/src/c_wrapper/platform.h
index 3474c227bb19e3ad27b14445ca083581a7508668..00c24fa81144f16c095be76827f17d6b30a3eba2 100644
--- a/src/c_wrapper/platform.h
+++ b/src/c_wrapper/platform.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ platform
 
+extern template class clobj<cl_platform_id>;
+
 class platform : public clobj<cl_platform_id> {
 public:
     using clobj::clobj;
diff --git a/src/c_wrapper/program.cpp b/src/c_wrapper/program.cpp
index b1f6d6688953eda7195547866bd9671015e1bbc6..c3f67defc34fca97276021ff62b75de81fb65ef5 100644
--- a/src/c_wrapper/program.cpp
+++ b/src/c_wrapper/program.cpp
@@ -5,6 +5,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_program>;
+
 program::~program()
 {
     pyopencl_call_guarded_cleanup(clReleaseProgram, this);
diff --git a/src/c_wrapper/program.h b/src/c_wrapper/program.h
index 21e93bd5536b0f01dc46226a2cc21b2db16c6096..e4830427a0e7efd9e29dfe53827b66b03d04a471 100644
--- a/src/c_wrapper/program.h
+++ b/src/c_wrapper/program.h
@@ -9,6 +9,8 @@ class device;
 
 // {{{ program
 
+extern template class clobj<cl_program>;
+
 class program : public clobj<cl_program> {
 private:
     program_kind_type m_program_kind;
diff --git a/src/c_wrapper/sampler.cpp b/src/c_wrapper/sampler.cpp
index 0c6cb902494774da4b7d9bb81b3f88dc151488ce..b961e00fa3fad5e8843ffef6a6de146522d4cfba 100644
--- a/src/c_wrapper/sampler.cpp
+++ b/src/c_wrapper/sampler.cpp
@@ -4,6 +4,8 @@
 
 namespace pyopencl {
 
+template class clobj<cl_sampler>;
+
 sampler::~sampler()
 {
     pyopencl_call_guarded_cleanup(clReleaseSampler, this);
diff --git a/src/c_wrapper/sampler.h b/src/c_wrapper/sampler.h
index ed934f75118c34c9efe806ec06c576c0fcc6e3fc..30b1508bc2d984e2146e57d61d63b44b37dd4753 100644
--- a/src/c_wrapper/sampler.h
+++ b/src/c_wrapper/sampler.h
@@ -7,6 +7,8 @@ namespace pyopencl {
 
 // {{{ sampler
 
+extern template class clobj<cl_sampler>;
+
 class sampler : public clobj<cl_sampler> {
 public:
     PYOPENCL_DEF_CL_CLASS(SAMPLER);