diff --git a/io.h b/io.h
index 19201c088..05aa5ed37 100644
--- a/io.h
+++ b/io.h
@@ -50,7 +50,7 @@ enum ethash_io_rc {
 
 // small hack for windows. I don't feel I should use va_args and forward just
 // to have this one function properly cross-platform abstracted
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(__GNUC__)
 #define snprintf(...) sprintf_s(__VA_ARGS__)
 #endif
 
diff --git a/io_win32.c b/io_win32.c
index d9c54d141..2e6c8deb8 100644
--- a/io_win32.c
+++ b/io_win32.c
@@ -25,7 +25,7 @@
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <Shlobj.h>
+#include <shlobj.h>
 
 FILE* ethash_fopen(char const* file_name, char const* mode)
 {