diff --git a/tools/qfcc/include/type.h b/tools/qfcc/include/type.h
index 40c7d2389..9b880919f 100644
--- a/tools/qfcc/include/type.h
+++ b/tools/qfcc/include/type.h
@@ -199,7 +199,7 @@ type_t *uint_type (const type_t *base) __attribute__((pure));
 */
 type_t *float_type (const type_t *base) __attribute__((pure));
 
-type_t *array_type (type_t *aux, int size);
+type_t *array_type (const type_t *aux, int size);
 type_t *based_array_type (type_t *aux, int base, int top);
 type_t *alias_type (type_t *type, type_t *alias_chain, const char *name);
 const type_t *unalias_type (const type_t *type) __attribute__((pure));
diff --git a/tools/qfcc/source/type.c b/tools/qfcc/source/type.c
index 03d42a3ff..732389391 100644
--- a/tools/qfcc/source/type.c
+++ b/tools/qfcc/source/type.c
@@ -746,7 +746,7 @@ float_type (const type_t *base)
 }
 
 type_t *
-array_type (type_t *aux, int size)
+array_type (const type_t *aux, int size)
 {
 	type_t      _new;
 	type_t     *new = &_new;
@@ -763,7 +763,7 @@ array_type (type_t *aux, int size)
 	}
 	new->t.array.size = size;
 	if (aux) {
-		new = find_type (append_type (new, aux));
+		new = find_type (append_type (new, (type_t *) aux));
 	}
 	return new;
 }