diff --git a/clang/lib/Headers/opencl-c-base.h b/clang/lib/Headers/opencl-c-base.h
--- a/clang/lib/Headers/opencl-c-base.h
+++ b/clang/lib/Headers/opencl-c-base.h
@@ -164,7 +164,7 @@
 typedef double double16 __attribute__((ext_vector_type(16)));
 #endif
 
-#if defined(__OPENCL_CPP_VERSION__) || (__OPENCL_C_VERSION__ >= CL_VERSION_2_0)
+#if defined(__OPENCL_CPP_VERSION__) || defined(__OPENCL_C_VERSION__)
 #define NULL ((void*)0)
 #endif
 
diff --git a/clang/test/SemaOpenCL/null_literal.cl b/clang/test/SemaOpenCL/null_literal.cl
--- a/clang/test/SemaOpenCL/null_literal.cl
+++ b/clang/test/SemaOpenCL/null_literal.cl
@@ -1,4 +1,7 @@
 // RUN: %clang_cc1 -verify %s
+// RUN: %clang_cc1 -cl-std=CL1.0 -verify %s
+// RUN: %clang_cc1 -cl-std=CL1.1 -verify %s
+// RUN: %clang_cc1 -cl-std=CL1.2 -verify %s
 // RUN: %clang_cc1 -cl-std=CL2.0 -DCL20 -verify %s
 
 #define NULL ((void*)0)