diff --git a/Makefile.win32 b/Makefile.win32
index efdd7de4e0..216e3f6c17 100644
--- a/Makefile.win32
+++ b/Makefile.win32
@@ -82,7 +82,7 @@ ifeq ($(HAVE_FBO), 1)
 endif
 
 ifeq ($(HAVE_DYLIB), 1)
-   OBJ += gfx/ext.c
+   OBJ += gfx/ext.o
 endif
 
 ifneq ($(V),1)
diff --git a/Makefile.win64 b/Makefile.win64
index 57b801c9c2..414dd440cd 100644
--- a/Makefile.win64
+++ b/Makefile.win64
@@ -82,7 +82,7 @@ ifeq ($(HAVE_FBO), 1)
 endif
 
 ifeq ($(HAVE_DYLIB), 1)
-   OBJ += gfx/ext.c
+   OBJ += gfx/ext.o
 endif
 
 
diff --git a/gfx/ext/ssnes_video.h b/gfx/ext/ssnes_video.h
index 9134687281..7ef107c046 100644
--- a/gfx/ext/ssnes_video.h
+++ b/gfx/ext/ssnes_video.h
@@ -11,7 +11,7 @@ extern "C" {
 #endif
 
 #ifdef _WIN32
-#define SSNES_API_DECL __decltype(dllexport) __cdecl
+#define SSNES_API_DECL __declspec(dllexport) __cdecl
 #else
 #define SSNES_API_DECL
 #endif