diff --git a/loopy/target/opencl.py b/loopy/target/opencl.py
index 9b5c4544b934e3fe44215175d07896eba560c014..4b88e65554ef4b23db59bed852ceec468f8868e3 100644
--- a/loopy/target/opencl.py
+++ b/loopy/target/opencl.py
@@ -284,7 +284,7 @@ class OpenCLTarget(CTarget):
         """
         if kind == "local":
             if comment:
-                comment = "/* %s */" % comment
+                comment = " /* %s */" % comment
 
             from loopy.codegen import GeneratedInstruction
             from cgen import Statement