diff --git a/cmake/modules/CMakeFunctions.cmake b/cmake/modules/CMakeFunctions.cmake
index af6f9e6c..9dde18b0 100644
--- a/cmake/modules/CMakeFunctions.cmake
+++ b/cmake/modules/CMakeFunctions.cmake
@@ -146,6 +146,7 @@ function(apply_patches repo_dir patches_dirs base_revision target_branch ret)
                     WORKING_DIRECTORY ${repo_dir}
                     OUTPUT_VARIABLE patching_log
                     ERROR_QUIET
+                    RESULT_VARIABLE ret_apply_patch
                 )
                 message(STATUS "[OPENCL-CLANG] Not present - ${patching_log}")
             endif()
@@ -161,6 +162,8 @@ function(apply_patches repo_dir patches_dirs base_revision target_branch ret)
     endif()
     if (NOT (ret_not_git_repo OR ret_check_out OR ret_apply_patch))
         set(${ret} True PARENT_SCOPE)
+    else()
+        message(FATAL_ERROR "[OPENCL-CLANG] Failed to apply patch!")
     endif()
 endfunction()