diff --git a/test_conformance/gl/test_images_read_common.cpp b/test_conformance/gl/test_images_read_common.cpp
index dc6ad9fa..d12936e8 100644
--- a/test_conformance/gl/test_images_read_common.cpp
+++ b/test_conformance/gl/test_images_read_common.cpp
@@ -786,7 +786,7 @@ int test_images_read_common(cl_device_id device, cl_context context,
 
             // Note a successful format test, if we passed every size.
 
-            if (sidx == sizeof(sizes) / sizeof(sizes[0]))
+            if (sidx == nsizes)
             {
                 log_info("passed: Image read test for GL format  %s : %s : %s "
                          ": %s\n\n",