diff --git a/ScriptHandler.cpp b/ScriptHandler.cpp
index 534e256..97fae49 100644
--- a/ScriptHandler.cpp
+++ b/ScriptHandler.cpp
@@ -1003,7 +1003,7 @@ int ScriptHandler::readScript( char *path )
 
 int ScriptHandler::readScriptSub( FILE *fp, char **buf, int encrypt_mode )
 {
-    char magic[5] = {0x79, 0x57, 0x0d, 0x80, 0x04 };
+    unsigned char magic[5] = {0x79, 0x57, 0x0d, 0x80, 0x04 };
     int  magic_counter = 0;
     bool newline_flag = true;
     bool cr_flag = false;