Fixed bug reported by winapi_check.

diff --git a/include/wine/winnet16.h b/include/wine/winnet16.h
index 67bab0d..399fd23 100644
--- a/include/wine/winnet16.h
+++ b/include/wine/winnet16.h
@@ -180,7 +180,7 @@
  * Get User
  */
 
-WORD WINAPI WNetGetUser16(LPSTR,LPINT16);
+WORD WINAPI WNetGetUser16(LPCSTR,LPSTR,LPINT16);
 
 
 /*
diff --git a/misc/network.c b/misc/network.c
index a7ea2b0..17411d2 100644
--- a/misc/network.c
+++ b/misc/network.c
@@ -295,9 +295,9 @@
 /**************************************************************************
  *		WNetGetUser16			[USER.516]
  */
-WORD WINAPI WNetGetUser16( LPSTR szUser, LPINT16 nBufferSize )
+WORD WINAPI WNetGetUser16( LPCSTR lpName, LPSTR szUser, LPINT16 nBufferSize )
 {
-    FIXME( "(%p, %p): stub\n", szUser, nBufferSize );
+    FIXME( "(%p, %p, %p): stub\n", lpName, szUser, nBufferSize );
     return WN16_NOT_SUPPORTED;
 }