diff --git a/reactos/base/services/eventlog/rpc.c b/reactos/base/services/eventlog/rpc.c
index 4913794d369..1d4b7e9436a 100644
--- a/reactos/base/services/eventlog/rpc.c
+++ b/reactos/base/services/eventlog/rpc.c
@@ -462,7 +462,7 @@ NTSTATUS ElfrReportEventW(
                                            EventID,
                                            lpLogHandle->szName,
                                            ComputerName->Buffer,
-                                           sizeof(PRPC_SID),
+                                           sizeof(RPC_SID),
                                            &UserSID,
                                            NumStrings,
                                            (WCHAR*)lpStrings,
diff --git a/reactos/drivers/video/videoprt/services.c b/reactos/drivers/video/videoprt/services.c
index 18862955b67..bece37565d2 100644
--- a/reactos/drivers/video/videoprt/services.c
+++ b/reactos/drivers/video/videoprt/services.c
@@ -111,6 +111,6 @@ VideoPortGetAgpServices(
       return FALSE;
    }
 
-   RtlCopyMemory(AgpServices, &Interface.AgpReservePhysical, sizeof(PVIDEO_PORT_AGP_SERVICES));
+   RtlCopyMemory(AgpServices, &Interface.AgpReservePhysical, sizeof(VIDEO_PORT_AGP_SERVICES));
    return TRUE;
 }
diff --git a/reactos/hal/halx86/generic/usage.c b/reactos/hal/halx86/generic/usage.c
index b1e3ace6241..1c5a5bb7ff1 100644
--- a/reactos/hal/halx86/generic/usage.c
+++ b/reactos/hal/halx86/generic/usage.c
@@ -132,7 +132,7 @@ HalpBuildPartialFromIdt(IN ULONG Entry,
     RawDescriptor->u.Interrupt.Affinity = HalpActiveProcessors;
     
     /* The translated copy is identical */
-    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(PCM_PARTIAL_RESOURCE_DESCRIPTOR));
+    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
     
     /* But the vector and IRQL must be set correctly */
     TranslatedDescriptor->u.Interrupt.Vector = Entry;
@@ -180,7 +180,7 @@ HalpBuildPartialFromAddress(IN INTERFACE_TYPE Interface,
     }
     
     /* Make an identical copy to begin with */
-    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(PCM_PARTIAL_RESOURCE_DESCRIPTOR));
+    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
     
     /* Check what this is */
     if (RawDescriptor->Type == CmResourceTypePort)