1 files changed, 4 insertions, 2 deletions
diff --git a/bignum.c b/bignum.c
index c010bf7046..16cb8e1602 100644
--- a/bignum.c
+++ b/bignum.c
@@ -392,8 +392,10 @@ rb_cstr_to_inum(str, base, badcheck)
 	}
 	break;
     }
-    while (*str == '0') str++;	/* squeeze preceeding 0s */
-    
+    if (*str == '0') {		/* squeeze preceeding 0s */
+	while (*++str == '0');
+	--str;
+    }
     len *= strlen(str)*sizeof(char);
 
     if (len <= (sizeof(VALUE)*CHAR_BIT)) {