diff --git a/polymer/eduke32/source/common_game.h b/polymer/eduke32/source/common_game.h
index 1b2e064e3..9ea199176 100644
--- a/polymer/eduke32/source/common_game.h
+++ b/polymer/eduke32/source/common_game.h
@@ -90,7 +90,7 @@ extern void G_SetupGlobalPsky(void);
 //////////
 
 extern char g_modDir[BMAX_PATH];
-
+extern int32_t kopen4loadfrommod(const char *filename, char searchfirst);
 extern void G_AddSearchPaths(void);
 extern void G_CleanupSearchPaths(void);
 
diff --git a/polymer/eduke32/source/sounds_mapster32.c b/polymer/eduke32/source/sounds_mapster32.c
index eb7354c1f..480e9bc77 100644
--- a/polymer/eduke32/source/sounds_mapster32.c
+++ b/polymer/eduke32/source/sounds_mapster32.c
@@ -43,6 +43,8 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #endif
 
 #include "sounds_mapster32.h"
+#include "common.h"
+#include "common_game.h"
 
 #define LOUDESTVOLUME 150
 #define MUSICANDSFX 5