diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ccb7cec080b3b4c04832ae079300d0e50c94a3f5..870c2a6bfd428657a8145bc1eeca3061bd3196f9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -60,16 +60,16 @@ Python 3.6 POCL Twice With Cache:
   except:
   - tags
 
-# PyPy AMD CPU:
+# PyPy POCL:
 #   script:
 #   - export PY_EXE=pypy
-#   - export PYOPENCL_TEST="amd:pu"
+#   - export PYOPENCL_TEST=portable
 #   - export EXTRA_INSTALL="numpy mako"
 #   - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
 #   - ". ./build-and-test-py-project.sh"
 #   tags:
 #   - pypy
-#   - amd-cl-cpu
+#   - pocl
 #   except:
 #   - tags
 
@@ -87,19 +87,19 @@ Python 3.6 POCL Examples:
   except:
   - tags
 
-# CentOS binary:
-#   script:
-#   - (cd build-helpers; ./make-linux-build-docker.sh --nodate)
-#   - (cd ./build-helpers; ./loopy-centos6 ../examples/fortran/sparse.floopy)
-#   artifacts:
-#     expire_in: 4 weeks
-#     paths:
-#     - build-helpers/loopy-centos6
-#   tags:
-#   - docker
-#   only:
-#   - master
-#   retry: 2
+CentOS binary:
+  script:
+  - (cd build-helpers; ./make-linux-build-docker.sh --nodate)
+  - (cd ./build-helpers; ./loopy-centos6 ../examples/fortran/sparse.floopy)
+  artifacts:
+    expire_in: 4 weeks
+    paths:
+    - build-helpers/loopy-centos6
+  tags:
+  - docker
+  only:
+  - master
+  retry: 2
 
 Documentation:
   script:
diff --git a/loopy/target/cuda.py b/loopy/target/cuda.py
index 027f27838bf68511905bd34cf75d0b361c749629..ae9d425257cae2f8c62576cd5b2cf8eddc368717 100644
--- a/loopy/target/cuda.py
+++ b/loopy/target/cuda.py
@@ -45,7 +45,8 @@ class vec:  # noqa
 def _create_vector_types():
     field_names = ["x", "y", "z", "w"]
 
-    if tuple.__itemsize__ * 8 == 32:
+    import sys
+    if sys.maxsize <= 2**33:
         long_dtype = np.int32
         ulong_dtype = np.uint32
     else: