diff --git a/src/engine/platform/k053260.cpp b/src/engine/platform/k053260.cpp
index b35bc5a2..1705f156 100644
--- a/src/engine/platform/k053260.cpp
+++ b/src/engine/platform/k053260.cpp
@@ -22,7 +22,7 @@
 #include "../../ta-log.h"
 #include <math.h>
 
-#define rWrite(a,v) {if(!skipRegisterWrites && a<0x30) {k053260.write(a,v); regPool[a]=v; if(dumpWrites) addWrite(a,v);}}
+#define rWrite(a,v) {if((!skipRegisterWrites) && (a<0x30)) {k053260.write(a,v); regPool[a]=v; if(dumpWrites) addWrite(a,v);}}
 
 #define CHIP_DIVIDER 16
 #define TICK_DIVIDER 64 // for match to YM3012 output rate