diff --git a/src/tests/add-ons/kernel/kernelland_emu/vm.cpp b/src/tests/add-ons/kernel/kernelland_emu/vm.cpp
index 2bdd5a016c..10fc4a17e8 100644
--- a/src/tests/add-ons/kernel/kernelland_emu/vm.cpp
+++ b/src/tests/add-ons/kernel/kernelland_emu/vm.cpp
@@ -29,7 +29,7 @@ user_strlcpy(char *to, const char *from, size_t size)
 }
 
 
-size_t
+page_num_t
 vm_page_num_pages(void)
 {
 	return 65536;