diff --git a/src/libs/vdxf/dxflib/dl_codes.h b/src/libs/vdxf/dxflib/dl_codes.h
index 2336b3685..1c567b051 100644
--- a/src/libs/vdxf/dxflib/dl_codes.h
+++ b/src/libs/vdxf/dxflib/dl_codes.h
@@ -42,7 +42,7 @@
 #define strcasecmp(s,t) stricmp(s,t)
 #endif
 
-#if defined(_WIN32)
+#if defined(_WIN32)&&!defined(strcasecmp)
 #define strcasecmp(s,t) _stricmp(s,t)
 #endif
 
@@ -50,7 +50,9 @@
 #ifdef _WIN32
 #undef M_PI
 #define M_PI   3.14159265358979323846
+#if defined(Q_CC_MSVC)
 #pragma warning(disable : 4800)
+#endif // Q_CC_MSVC
 #endif
 
 #ifndef M_PI
diff --git a/src/libs/vdxf/dxflib/dl_dxf.h b/src/libs/vdxf/dxflib/dl_dxf.h
index 1cb77c5ea..7d36df357 100644
--- a/src/libs/vdxf/dxflib/dl_dxf.h
+++ b/src/libs/vdxf/dxflib/dl_dxf.h
@@ -41,7 +41,9 @@
 #ifdef _WIN32
 #undef M_PI
 #define M_PI   3.14159265358979323846
+#if defined(Q_CC_MSVC)
 #pragma warning(disable : 4800)
+#endif // Q_CC_MSVC
 #endif
 
 #ifndef M_PI