diff --git a/loopy/library/preamble.py b/loopy/library/preamble.py
index e30d2a92e9aa3dba4ff8116ab8fe13c0fd879ff2..86c1fecec1019e9b0b5938464c27f3c07932211c 100644
--- a/loopy/library/preamble.py
+++ b/loopy/library/preamble.py
@@ -43,7 +43,7 @@ def default_preamble_generator(seen_dtypes, seen_functions):
 
     if has_double:
         yield ("00_enable_double", """
-            #if __OPENCL_VERSION__ <= CL_VERSION_1_1
+            #if __OPENCL_C_VERSION__ < 120
             #pragma OPENCL EXTENSION cl_khr_fp64: enable
             #endif
             """)