diff --git a/include/wx/compiler.h b/include/wx/compiler.h
index 163f6a58c5..e633ca158e 100644
--- a/include/wx/compiler.h
+++ b/include/wx/compiler.h
@@ -16,9 +16,15 @@
     Compiler detection and related helpers.
  */
 
+/*
+    Notice that Intel compiler can be used as Microsoft Visual C++ add-on and
+    so we should define both __INTELC__ and __VISUALC__ for it.
+ */
 #ifdef __INTEL_COMPILER
 #   define __INTELC__
-#elif defined(_MSC_VER)
+#endif
+
+#if defined(_MSC_VER)
     /*
        define another standard symbol for Microsoft Visual C++: the standard
        one (_MSC_VER) is also defined by some other compilers.