diff --git a/lib/libc/io/unistd/munmap.c b/lib/libc/io/unistd/munmap.c
index 27837d2..ec7d213 100644
--- a/lib/libc/io/unistd/munmap.c
+++ b/lib/libc/io/unistd/munmap.c
@@ -25,7 +25,17 @@ int munmap(void *addr, size_t length)
 
 	status = address_space_unmap(address_space, (virt_addr_t)addr, length);
 
+	if (status != KERN_OK) {
+		kern_handle_close(address_space);
+		return __set_errno(__errno_from_kern_status(status));
+	}
+
+	status = address_space_release(
+		address_space,
+		(virt_addr_t)addr,
+		length);
 	kern_handle_close(address_space);
+
 	if (status != KERN_OK) {
 		return __set_errno(__errno_from_kern_status(status));
 	}