diff --git a/cmake/QtCompilerFlags.cmake b/cmake/QtCompilerFlags.cmake
index a376ac00975..0954ba95c50 100644
--- a/cmake/QtCompilerFlags.cmake
+++ b/cmake/QtCompilerFlags.cmake
@@ -9,7 +9,11 @@ if (MSVC)
     list(APPEND _qt_compiler_warning_flags_on /W3)
     list(APPEND _qt_compiler_warning_flags_off -W0)
 else()
-    list(APPEND _qt_compiler_warning_flags_on -Wall -Wextra)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "GHS") # There is no -Wextra flag for GHS compiler.
+        list(APPEND _qt_compiler_warning_flags_on -Wall)
+    else()
+        list(APPEND _qt_compiler_warning_flags_on -Wall -Wextra)
+    endif()
     list(APPEND _qt_compiler_warning_flags_off -w)
 endif()