diff --git a/tools/tp.c b/tools/tp.c
index 4ad70d4..3be903e 100644
--- a/tools/tp.c
+++ b/tools/tp.c
@@ -527,7 +527,7 @@ end_loop:
 
         size_t size;
         size_t len;
-        char c;
+        int c;
 
         Free(fileName);
         if (!file)