diff --git a/src/sp65/main.c b/src/sp65/main.c
index c14bf38c0..c0d912eb0 100644
--- a/src/sp65/main.c
+++ b/src/sp65/main.c
@@ -196,7 +196,7 @@ static void OptPop (const char* Opt attribute ((unused)),
 
 
 
-static void OptRead (const char* Opt, const char* Arg)
+static void OptRead (const char* Opt attribute ((unused)), const char* Arg)
 /* Read an input file */
 {
     static const char* NameList[] = {
diff --git a/src/sp65/pcx.c b/src/sp65/pcx.c
index 036d03c85..53075a1e6 100644
--- a/src/sp65/pcx.c
+++ b/src/sp65/pcx.c
@@ -42,6 +42,7 @@
 #include "xmalloc.h"
 
 /* sp65 */
+#include "attr.h"
 #include "error.h"
 #include "fileio.h"
 #include "pcx.h"