diff --git a/sys/decklink/win/DeckLinkAPI.h b/sys/decklink/win/DeckLinkAPI.h
index 18a0c52082..279946f2a5 100644
--- a/sys/decklink/win/DeckLinkAPI.h
+++ b/sys/decklink/win/DeckLinkAPI.h
@@ -16,7 +16,9 @@
 */
 /* @@MIDL_FILE_HEADING(  ) */
 
+#ifdef _MSC_VER
 #pragma warning( disable: 4049 )  /* more than 64k source lines */
+#endif
 
 
 /* verify that the <rpcndr.h> version is high enough to compile this file*/
diff --git a/sys/decklink/win/DeckLinkAPI_i.c b/sys/decklink/win/DeckLinkAPI_i.c
index cd1e98740a..e69d9766a4 100644
--- a/sys/decklink/win/DeckLinkAPI_i.c
+++ b/sys/decklink/win/DeckLinkAPI_i.c
@@ -18,7 +18,9 @@
 */
 /* @@MIDL_FILE_HEADING(  ) */
 
+#ifdef _MSC_VER
 #pragma warning( disable: 4049 )  /* more than 64k source lines */
+#endif
 
 
 #ifdef __cplusplus