diff --git a/string.c b/string.c
index 85c2fe9..f584627 100644
--- a/string.c
+++ b/string.c
@@ -274,7 +274,7 @@ void cu_sprintf(char* dst, size_t maxLen, const char* fmt, ...)
     char* cur,*end,c;
     char numbuf[64];
     
-    idx = 1;
+    idx = 3;
     cur = dst;
     end = dst+maxLen;
     while((c = *fmt++) && cur != end)
diff --git a/test.c b/test.c
index d7327e0..4db07a9 100644
--- a/test.c
+++ b/test.c
@@ -179,10 +179,10 @@ int main()
     cu_sprintf(str3, 64, "hello %u world \"%s\"", 2312, "test");
     printf("cu_sprintf\t%s\n", str3);
 
-    const char* str4 = "test 2312";
+    const char* str4 = "\"test\" 2312";
     char str5[8] = {0};
     int val5 = 0;
-    cu_sscanf((char*)str4, "%s %d", str5, &val5);
+    cu_sscanf((char*)str4, "\"%s\" %d", str5, &val5);
     printf("cu_sscanf\t%s\t%u\n", str5, val5);
 
     cutil_exit();