diff --git a/kernel/hal/x86/mm/pmm.cpp b/kernel/hal/x86/mm/pmm.cpp
index a54d796..8249bd3 100644
--- a/kernel/hal/x86/mm/pmm.cpp
+++ b/kernel/hal/x86/mm/pmm.cpp
@@ -49,7 +49,7 @@ auto PMM::operator >> (void * &addr) -> PMM & {
 	addr=nullptr;
 	return *this;
 }
-auto operator << (const void * addr) -> PMM & {
+auto PMM::operator << (const void * addr) -> PMM & {
 	unsigned int address=(unsigned int)addr;
 	address>>=12;
 	int index=address>>5;