diff --git a/src/scripting/vm/vmexec.h b/src/scripting/vm/vmexec.h
index 65e2e756c..8f79bd90b 100644
--- a/src/scripting/vm/vmexec.h
+++ b/src/scripting/vm/vmexec.h
@@ -436,7 +436,7 @@ begin:
 		if (C == CASTB_I)
 		{
 			ASSERTD(a); ASSERTD(B);
-			reg.f[a] = !!reg.d[B];
+			reg.d[a] = !!reg.d[B];
 		}
 		else if (C == CASTB_F)
 		{