diff --git a/src/lisp/solaris-os.c b/src/lisp/solaris-os.c
index da1717b85333c34185765f55df87154fb3e29323..7067d1f6b2bec811c12dd73753772846798115f5 100644
--- a/src/lisp/solaris-os.c
+++ b/src/lisp/solaris-os.c
@@ -436,7 +436,7 @@ static unsigned long *space_size[] = {
 #define HOLE_SIZE 0x2000
 
 void
-make_hole(int index)
+make_hole(int k)
 {
     os_vm_address_t hole;