diff --git a/aksetup_helper.py b/aksetup_helper.py
index 924df5d6accca5878e9a69b5445fa0c36fb54ecd..5637d68cd98846a826562cf6ca19f038b1778efb 100644
--- a/aksetup_helper.py
+++ b/aksetup_helper.py
@@ -493,7 +493,7 @@ def set_up_shipped_boost_if_requested(conf):
         if not exists("bpl-subset/bpl_subset/boost/version.hpp"):
             print >>sys.stderr, "------------------------------------------------------------------------"
             print >>sys.stderr, "The shipped Boost library was not found, but USE_SHIPPED_BOOST is True."
-            print >>sys.stderr, "(It should be under bpl-subset/)"
+            print >>sys.stderr, "(The files should be under bpl-subset/.)"
             print >>sys.stderr, "------------------------------------------------------------------------"
             print >>sys.stderr, "If you got this package from git, you probably want to do"
             print >>sys.stderr, ""
diff --git a/examples/matrix-multiply.py b/examples/matrix-multiply.py
index c8fab12e19b5d4499bd241e53c7433049ad7e642..53519ce7c10c1f1097f00db2ea3728268e930494 100644
--- a/examples/matrix-multiply.py
+++ b/examples/matrix-multiply.py
@@ -43,7 +43,7 @@ KERNEL_CODE = """
 //! Matrix multiplication on the device: C = A * B
 //! WA is A's width and WB is B's width
 ////////////////////////////////////////////////////////////////////////////////
-__kernel __attribute__((reqd_work_group_size(16,16,1))) 
+__kernel __attribute__((reqd_work_group_size(BLOCK_SIZE,BLOCK_SIZE,1))) 
 void
 matrixMul( __global float* C, __global float* A, __global float* B)
 {