diff --git a/kernel/src/sys/mmap.cpp b/kernel/src/sys/mmap.cpp
index 10a2c088..d9a201b2 100644
--- a/kernel/src/sys/mmap.cpp
+++ b/kernel/src/sys/mmap.cpp
@@ -46,7 +46,7 @@ Result<u64> sys_mmap(Registers*, SyscallArgs args)
         else
         {
             if ((params.prot & PROT_WRITE) && !(description->flags & O_WRONLY)) return err(EACCES);
-            shmid = TRY(description->inode->query_shared_memory(params.offset, params.len));
+            shmid = TRY(description->inode->query_shared_memory(params.offset, params.len / ARCH_PAGE_SIZE));
         }
         shmem = g_shared_memory_map.try_get_ref(shmid);
         shmem->refs++;
@@ -72,10 +72,10 @@ Result<u64> sys_mmap(Registers*, SyscallArgs args)
     if (params.prot == PROT_NONE) mmu_flags = MMU::NoExecute;
 
 #ifdef MMAP_DEBUG
-    kdbgln("mmap: mapping memory at %#lx, size=%zu", address, len);
+    kdbgln("mmap: mapping memory at %#lx, size=%zu", address, params.len);
 #endif
 
-    if (shmem) { TRY(shmem->map(address, mmu_flags, params.offset, get_blocks_from_size(params.len, ARCH_PAGE_SIZE))); }
+    if (shmem) { TRY(shmem->map(address, mmu_flags, params.offset, params.len / ARCH_PAGE_SIZE)); }
     else
     {
         TRY(MemoryManager::alloc_at_zeroed(address, get_blocks_from_size(params.len, ARCH_PAGE_SIZE), mmu_flags));