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-rw-r--r--src/misc/a64l.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/src/misc/a64l.c b/src/misc/a64l.c
index 86aeefe0..60557710 100644
--- a/src/misc/a64l.c
+++ b/src/misc/a64l.c
@@ -9,9 +9,12 @@ long a64l(const char *s)
 {
 	int e;
 	uint32_t x = 0;
-	for (e=0; e<36 && *s; e+=6, s++)
-		x |= (strchr(digits, *s)-digits)<<e;
-	return x;
+	for (e=0; e<36 && *s; e+=6, s++) {
+		const char *d = strchr(digits, *s);
+		if (!d) break;
+		x |= (uint32_t)(d-digits)<<e;
+	}
+	return (int32_t)x;
 }
 
 char *l64a(long x0)