diff --git a/dll/win32/netapi32/group_new.c b/dll/win32/netapi32/group_new.c
index 9c3234abe53..027f1f72735 100644
--- a/dll/win32/netapi32/group_new.c
+++ b/dll/win32/netapi32/group_new.c
@@ -306,6 +306,9 @@ NetGroupAdd(
     TRACE("NetGroupAdd(%s, %d, %p, %p)\n",
           debugstr_w(servername), level, buf, parm_err);
 
+    if (parm_err != NULL)
+        *parm_err = PARM_ERROR_NONE;
+
     /* Initialize the Server name*/
     if (servername != NULL)
         RtlInitUnicodeString(&ServerName, servername);
diff --git a/dll/win32/netapi32/local_group.c b/dll/win32/netapi32/local_group.c
index 798248d8fcc..1ef5aa64f98 100644
--- a/dll/win32/netapi32/local_group.c
+++ b/dll/win32/netapi32/local_group.c
@@ -352,6 +352,9 @@ NetLocalGroupAdd(
     TRACE("(%s %d %p %p) stub!\n", debugstr_w(servername), level, buf,
           parm_err);
 
+    if (parm_err != NULL)
+        *parm_err = PARM_ERROR_NONE;
+
     /* Initialize the Server name*/
     if (servername != NULL)
         RtlInitUnicodeString(&ServerName, servername);
diff --git a/dll/win32/netapi32/user.c b/dll/win32/netapi32/user.c
index d105634a521..3e29bc48c64 100644
--- a/dll/win32/netapi32/user.c
+++ b/dll/win32/netapi32/user.c
@@ -2060,6 +2060,9 @@ NetUserAdd(LPCWSTR servername,
 
     TRACE("(%s, %d, %p, %p)\n", debugstr_w(servername), level, bufptr, parm_err);
 
+    if (parm_err != NULL)
+        *parm_err = PARM_ERROR_NONE;
+
     /* Check the info level */
     switch (level)
     {