diff --git a/common/Darwin/DarwinMisc.cpp b/common/Darwin/DarwinMisc.cpp
index 5581273f6b..86cc2e7ba1 100644
--- a/common/Darwin/DarwinMisc.cpp
+++ b/common/Darwin/DarwinMisc.cpp
@@ -437,7 +437,7 @@ std::unique_ptr<SharedMemoryMappingArea> SharedMemoryMappingArea::Create(size_t
 {
 	pxAssertRel(Common::IsAlignedPow2(size, __pagesize), "Size is page aligned");
 
-	mach_vm_address_t alloc;
+	mach_vm_address_t alloc = 0;
 	const kern_return_t res =
 		mach_vm_map(mach_task_self(), &alloc, size, 0, VM_FLAGS_ANYWHERE,
 			MEMORY_OBJECT_NULL, 0, false, VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_NONE);