diff --git a/build_files/cmake/cmake_qtcreator_project.py b/build_files/cmake/cmake_qtcreator_project.py
index 32d20489e6a..c0a5b34318f 100755
--- a/build_files/cmake/cmake_qtcreator_project.py
+++ b/build_files/cmake/cmake_qtcreator_project.py
@@ -105,7 +105,14 @@ def create_qtc_project_main():
 
         qtc_cfg = os.path.join(PROJECT_DIR, "%s.config" % FILE_NAME)
         f = open(qtc_cfg, 'w')
-        f.write("// ADD PREDEFINED MACROS HERE!\n")
+        f.write("// ADD PREDEFINED MACROS TO %s_custom.config!\n" % FILE_NAME)
+        qtc_custom_cfg = os.path.join(PROJECT_DIR, "%s_custom.config" % FILE_NAME)
+        if os.path.exists(qtc_custom_cfg):
+            f.write(fc.read())
+            fc = open(qtc_custom_cfg, 'r')
+            f.write(fc.read())
+            fc.close()
+            f.write("\n")
         defines_final = [("#define %s %s" % (item[0], quote_define(item[1]))) for item in defines]
         if sys.platform != "win32":
             defines_final += cmake_compiler_defines()