diff --git a/reactos/ntoskrnl/include/internal/arm/mm.h b/reactos/ntoskrnl/include/internal/arm/mm.h
index bc330fe37bc..83b553fe6a5 100644
--- a/reactos/ntoskrnl/include/internal/arm/mm.h
+++ b/reactos/ntoskrnl/include/internal/arm/mm.h
@@ -164,6 +164,6 @@ typedef enum _ARM_DOMAIN
 
 #define PTE_BASE    0xC0000000
 #define PDE_BASE    0xC1000000
-#define HYPER_SPACE ((PVOID)0xC1100000)
+#define HYPER_SPACE 0xC1100000
 
 #endif
diff --git a/reactos/ntoskrnl/mm/arm/stubs.c b/reactos/ntoskrnl/mm/arm/stubs.c
index 0794321ad8e..b8a1a8ac5fe 100644
--- a/reactos/ntoskrnl/mm/arm/stubs.c
+++ b/reactos/ntoskrnl/mm/arm/stubs.c
@@ -619,7 +619,7 @@ MmCreateHyperspaceMapping(IN PFN_TYPE Page)
     //
     // Loop hyperspace PTEs (1MB)
     //
-    FirstPte = PointerPte = MiGetPteAddress(HYPER_SPACE);
+    FirstPte = PointerPte = MiGetPteAddress((PVOID)HYPER_SPACE);
     LastPte = PointerPte + 256;
     while (PointerPte <= LastPte)
     {
@@ -657,7 +657,7 @@ MmCreateHyperspaceMapping(IN PFN_TYPE Page)
     //
     // Return the address
     //
-    Address = HYPER_SPACE + ((PointerPte - FirstPte) * PAGE_SIZE);
+    Address = (PVOID)(HYPER_SPACE + ((PointerPte - FirstPte) * PAGE_SIZE));
     KeArmInvalidateTlbEntry(Address);
     DPRINT("[HMAP]: %p %lx\n", Address, Page);
     return Address;