diff --git a/reactos/dll/cpl/usrmgr/groupprops.c b/reactos/dll/cpl/usrmgr/groupprops.c
index ac30a280c00..8fa86c79c63 100644
--- a/reactos/dll/cpl/usrmgr/groupprops.c
+++ b/reactos/dll/cpl/usrmgr/groupprops.c
@@ -270,9 +270,9 @@ AddUsersToGroup(HWND hwndDlg,
 //        DebugPrintf(_T("Removed all users from the list!"));
 
         /* Set group members */
-        NetLocalGroupGetMembers(NULL, pGroupData->szGroupName, 1, (LPBYTE*)&membersInfo,
+        NetLocalGroupGetMembers(NULL, pGroupData->szGroupName, 1, (LPBYTE*)(DWORD_PTR)&membersInfo,
                                 MAX_PREFERRED_LENGTH, &dwRead, &dwTotal,
-                                &resumeHandle);
+                                (PDWORD_PTR)&resumeHandle);
 
         for (i = 0; i < dwRead; i++)
         {
diff --git a/reactos/dll/cpl/usrmgr/usrmgr.def b/reactos/dll/cpl/usrmgr/usrmgr.def
deleted file mode 100644
index bf450f18180..00000000000
--- a/reactos/dll/cpl/usrmgr/usrmgr.def
+++ /dev/null
@@ -1,6 +0,0 @@
-LIBRARY usrmgr.cpl
-
-EXPORTS
-CPlApplet@16
-
-; EOF
diff --git a/reactos/dll/cpl/usrmgr/usrmgr.rbuild b/reactos/dll/cpl/usrmgr/usrmgr.rbuild
index 54783ddcaab..f355cfd844b 100644
--- a/reactos/dll/cpl/usrmgr/usrmgr.rbuild
+++ b/reactos/dll/cpl/usrmgr/usrmgr.rbuild
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
 <module name="usrmgr" type="win32dll" extension=".cpl" baseaddress="${BASEADDRESS_USRMGR}" installbase="system32" installname="usrmgr.cpl" unicode="yes">
-	<importlibrary definition="usrmgr.def" />
+	<importlibrary definition="usrmgr.spec.def" />
 	<include base="usrmgr">.</include>
 	<define name="_WIN32_IE">0x600</define>
 	<define name="_WIN32_WINNT">0x501</define>
@@ -21,4 +21,5 @@
 	<file>users.c</file>
 	<file>usrmgr.c</file>
 	<file>usrmgr.rc</file>
+	<file>usrmgr.spec</file>
 </module>
diff --git a/reactos/dll/cpl/usrmgr/usrmgr.spec b/reactos/dll/cpl/usrmgr/usrmgr.spec
new file mode 100644
index 00000000000..9e552162fb0
--- /dev/null
+++ b/reactos/dll/cpl/usrmgr/usrmgr.spec
@@ -0,0 +1 @@
+@ stdcall CPlApplet(ptr long ptr ptr)