diff --git a/src/modal.c b/src/modal.c
index 9cd090f..ff74cc4 100644
--- a/src/modal.c
+++ b/src/modal.c
@@ -7,8 +7,8 @@ typedef struct {
 static int rules_len;
 static Rule rules[0x100];
 static char dict[0x8000], *dict_ = dict;
-static char prog[0x1000], *prog_ = prog;
-static char outp[0x1000], *outp_ = outp;
+static char bank_a[0x1000], *prog_ = bank_a;
+static char bank_b[0x1000], *outp_ = bank_b;
 static char *regs[0x100];
 
 #define spacer(c) (c == ' ' || c == '(' || c == ')')
@@ -78,7 +78,7 @@ bind(char r)
 			if(c == '(') depth++;
 			*outp_++ = c;
 			if(c == ')') --depth;
-			if(!depth) return;
+			if(!depth) return 1;
 		}
 	}
 	while(!spacer(s[0]) && (*outp_++ = *s++))
@@ -89,11 +89,11 @@ bind(char r)
 static void
 save(int rule)
 {
-	int i, end = outp_ - outp;
+	int i, end = outp_ - bank_b;
 	/* todo: change pointer instead of copying memory */
-	for(i = 0; i <= end; i++) prog[i] = outp[i];
-	prog_ = prog, outp_ = outp;
-	printf("%02d %s\n", rule, prog);
+	for(i = 0; i <= end; i++) bank_a[i] = bank_b[i];
+	prog_ = bank_a, outp_ = bank_b;
+	printf("%02d %s\n", rule, bank_a);
 }
 
 static char *
@@ -138,7 +138,7 @@ addrule(char *s)
 static int
 rewrite(void)
 {
-	char c, *p = prog;
+	char c, *p = bank_a;
 	while((c = *p)) {
 		int i;
 		if(p[0] == '<' && p[1] == '>')
@@ -217,7 +217,7 @@ main(int argc, char **argv)
 	if(!parse(argv[1]))
 		return !printf("Invalid Modal file: %s.\n", argv[1]);
 	print_rules();
-	printf(".. %s\n", prog);
+	printf(".. %s\n", bank_a);
 	while(rewrite())
 		;
 	return 0;