diff --git a/reactos/lib/advapi32/service/scm.c b/reactos/lib/advapi32/service/scm.c
index 9d1e6ef9501..566ead1100f 100644
--- a/reactos/lib/advapi32/service/scm.c
+++ b/reactos/lib/advapi32/service/scm.c
@@ -948,12 +948,12 @@ UnlockServiceDatabase(SC_LOCK ScLock)
 
 void __RPC_FAR * __RPC_USER midl_user_allocate(size_t len)
 {
-  return GlobalAlloc(GPTR,len);
+  return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
 }
 
 void __RPC_USER midl_user_free(void __RPC_FAR * ptr)
 {
-  GlobalFree(ptr);
+  HeapFree(GetProcessHeap(), 0, ptr);
 }
 
 /* EOF */
diff --git a/reactos/lib/setupapi/rpc.c b/reactos/lib/setupapi/rpc.c
index cb3b08bc7c0..1f7ab620a02 100644
--- a/reactos/lib/setupapi/rpc.c
+++ b/reactos/lib/setupapi/rpc.c
@@ -69,14 +69,14 @@ PnpUnbindLocalBindingHandle(VOID)
 void __RPC_FAR * __RPC_USER
 midl_user_allocate(size_t len)
 {
-  return GlobalAlloc(GPTR, len);
+  return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
 }
 
 
 void __RPC_USER
 midl_user_free(void __RPC_FAR * ptr)
 {
-  GlobalFree(ptr);
+  HeapFree(GetProcessHeap(), 0, ptr);
 }
 
 /* EOF */
diff --git a/reactos/services/umpnpmgr/umpnpmgr.c b/reactos/services/umpnpmgr/umpnpmgr.c
index f22ab5d3422..1d7b16b4ded 100644
--- a/reactos/services/umpnpmgr/umpnpmgr.c
+++ b/reactos/services/umpnpmgr/umpnpmgr.c
@@ -103,13 +103,13 @@ RpcServerThread(LPVOID lpParameter)
 
 void __RPC_FAR * __RPC_USER midl_user_allocate(size_t len)
 {
-  return GlobalAlloc(GPTR, len);
+  return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
 }
 
 
 void __RPC_USER midl_user_free(void __RPC_FAR * ptr)
 {
-  GlobalFree(ptr);
+  HeapFree(GetProcessHeap(), 0, ptr);
 }