Bug: https://bugs.gentoo.org/883463
--- a/main.c
+++ b/main.c
@@ -48,6 +48,7 @@
 #include "common.h"
 #include "packet.h"
 #include "sound.h"
+#include "main.h"
 
 extern unsigned char saved_level;
 extern unsigned char level;
@@ -74,9 +75,6 @@ static struct option long_options[] =
 
 extern void play_single_player();
 
-#ifndef swprintf
-int swprintf(wchar_t *wcs, size_t maxlen, const wchar_t *format, ...);
-#endif
 #endif
 
 int hwalpha;
--- /dev/null
+++ b/main.h
@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include <wchar.h>
+#ifndef swprintf
+int swprintf(wchar_t *wcs, size_t maxlen, const wchar_t *format, ...);
+#endif
+void remove_bubble(struct player_state* p, int x, int y, int evil);
--- a/singleplayer.c
+++ b/singleplayer.c
@@ -24,6 +24,7 @@
 
 #include "common.h"
 #include "sound.h"
+#include "main.h"
 
 #ifndef WIN32
 #include <unistd.h>