1 files changed, 2 insertions, 2 deletions
diff --git a/src/apu.h b/src/apu.h
index 5d08355..a4927ea 100644
--- a/src/apu.h
+++ b/src/apu.h
@@ -103,8 +103,8 @@ typedef struct
 } SIAPU;
 
 
-SAPU APU;
-SIAPU IAPU;
+extern SAPU APU;
+extern SIAPU IAPU;
 
 static INLINE void S9xAPUUnpackStatus(void)
 {