diff --git a/src/cl65/main.c b/src/cl65/main.c
index 17f816036..8ba5c3924 100644
--- a/src/cl65/main.c
+++ b/src/cl65/main.c
@@ -730,7 +730,7 @@ int main (int argc, char* argv [])
 	{ "--version",	  	0,	OptVersion		},
     };
 
-    int I;
+    unsigned I;
 
     /* Initialize the cmdline module */
     InitCmdLine (&argc, &argv, "cl65");
diff --git a/src/cl65/make/gcc.mak b/src/cl65/make/gcc.mak
index 88490859a..3f10c479b 100644
--- a/src/cl65/make/gcc.mak
+++ b/src/cl65/make/gcc.mak
@@ -6,7 +6,7 @@
 COMMON	= ../common
 
 CC=gcc
-CFLAGS = -O2 -g -Wall -I$(COMMON)
+CFLAGS = -O2 -g -Wall -W -Wno-unused-parameter -I$(COMMON)
 EBIND  = emxbind
 LDFLAGS=