diff --git a/zsnes/src/cfgparse.psr b/zsnes/src/cfgparse.psr
index d7a6b0a1..e70c5f8c 100644
--- a/zsnes/src/cfgparse.psr
+++ b/zsnes/src/cfgparse.psr
@@ -346,3 +346,4 @@ NEWSYM KeyEmuSpeedUp, dd 0
 NEWSYM KeyEmuSpeedDown, dd 0
 NEWSYM AllowUDLR, db 0
 NEWSYM KeyDisplayBatt, dd 0
+NEWSYM PrevBuildNum, dd 0
\ No newline at end of file