diff --git a/kernel/src/sys/mmap.cpp b/kernel/src/sys/mmap.cpp
index 3992ab66..46f8d5f7 100644
--- a/kernel/src/sys/mmap.cpp
+++ b/kernel/src/sys/mmap.cpp
@@ -53,7 +53,7 @@ Result<u64> sys_mmap(Registers*, SyscallArgs args)
     kdbgln("mmap: mapping memory at %#lx, size=%zu", address, len);
 #endif
 
-    return MemoryManager::alloc_at(address, get_blocks_from_size(len, ARCH_PAGE_SIZE), mmu_flags);
+    return MemoryManager::alloc_at_zeroed(address, get_blocks_from_size(len, ARCH_PAGE_SIZE), mmu_flags);
 }
 
 Result<u64> sys_munmap(Registers*, SyscallArgs args)