diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/lib/Sema/SemaType.cpp
@@ -1732,7 +1732,12 @@
 
   if (S.getLangOpts().OpenCL) {
     const auto &OpenCLOptions = S.getOpenCLOptions();
+    // FIXME: both variables IsOpenCLC30 and IsOpenCLC30Compatible should be
+    // unified into one when __opencl_c_3d_image_writes option is enabled in
+    // C++ for OpenCL 2021
     bool IsOpenCLC30 = (S.getLangOpts().OpenCLVersion == 300);
+    bool IsOpenCLC30Compatible =
+        S.getLangOpts().getOpenCLCompatibleVersion() == 300;
     // OpenCL C v3.0 s6.3.3 - OpenCL image types require __opencl_c_images
     // support.
     // OpenCL C v3.0 s6.2.1 - OpenCL 3d image write types requires support
@@ -1741,7 +1746,7 @@
     // that support OpenCL 3.0, cl_khr_3d_image_writes must be returned when and
     // only when the optional feature is supported
     if ((Result->isImageType() || Result->isSamplerT()) &&
-        (IsOpenCLC30 &&
+        (IsOpenCLC30Compatible &&
          !OpenCLOptions.isSupported("__opencl_c_images", S.getLangOpts()))) {
       S.Diag(DS.getTypeSpecTypeLoc(), diag::err_opencl_requires_extension)
           << 0 << Result << "__opencl_c_images";
diff --git a/clang/test/SemaOpenCL/unsupported-image.cl b/clang/test/SemaOpenCL/unsupported-image.cl
--- a/clang/test/SemaOpenCL/unsupported-image.cl
+++ b/clang/test/SemaOpenCL/unsupported-image.cl
@@ -1,6 +1,8 @@
 // RUN: %clang_cc1 -triple spir-unknown-unknown -verify -cl-std=CL3.0 -cl-ext=-__opencl_c_images,-__opencl_c_read_write_images,-cl_khr_3d_image_writes,-__opencl_c_3d_image_writes %s
 // RUN: %clang_cc1 -triple spir-unknown-unknown -verify -cl-std=CL3.0 -cl-ext=+__opencl_c_images,+__opencl_c_read_write_images,+cl_khr_3d_image_writes,+__opencl_c_3d_image_writes %s
 // RUN: %clang_cc1 -triple spir-unknown-unknown -verify -cl-std=CL3.0 -cl-ext=+__opencl_c_images,+__opencl_c_read_write_images,-cl_khr_3d_image_writes,-__opencl_c_3d_image_writes %s
+// RUN: %clang_cc1 -triple spir-unknown-unknown -verify -cl-std=clc++2021 -cl-ext=-__opencl_c_images,-__opencl_c_read_write_images,-cl_khr_3d_image_writes,-__opencl_c_3d_image_writes %s
+// RUN: %clang_cc1 -triple spir-unknown-unknown -verify -cl-std=clc++2021 -cl-ext=+__opencl_c_images %s
 
 #if defined(__opencl_c_images) && defined(__opencl_c_3d_image_writes)
 //expected-no-diagnostics