diff --git a/stepmania/src/Actor.h b/stepmania/src/Actor.h
index 215c45a8a6..bd817280ea 100644
--- a/stepmania/src/Actor.h
+++ b/stepmania/src/Actor.h
@@ -66,7 +66,7 @@ public:
 			COMPARE( fSkewX );
 			COMPARE( crop );
 			COMPARE( fade );
-			for( int i=0; i<ARRAYSIZE(diffuse); i++ )
+			for( unsigned i=0; i<ARRAYSIZE(diffuse); i++ )
 				COMPARE( diffuse[i] );
 			COMPARE( glow );
 			COMPARE( aux );