diff --git a/main.cpp b/main.cpp
index 72bd94b..3b8684f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1488,12 +1488,17 @@ static bool saveEntry(FILE* outFile, char* path, rk_entry_type type,
 }
 
 static inline uint32_t convertChipType(const char* chip) {
-	char buffer[5];
-	memset(buffer, 0, sizeof(buffer));
-	snprintf(buffer, sizeof(buffer), "%s", chip);
-	return buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
+    if (strlen(chip) > 4) {
+        return 0;
+    }
+
+    char buffer[5];
+    memset(buffer, 0, sizeof(buffer));
+    snprintf(buffer, sizeof(buffer), "%s", chip);
+    return buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
 }
 
+
 static inline uint32_t getChipType(const char* chip) {
 	printf("chip: %s\n", chip);
 	int chipType = RKNONE_DEVICE;