diff --git a/dlls/wtsapi32/wtsapi32.c b/dlls/wtsapi32/wtsapi32.c
index 898b95d1476..314ec6bb9ec 100644
--- a/dlls/wtsapi32/wtsapi32.c
+++ b/dlls/wtsapi32/wtsapi32.c
@@ -120,7 +120,9 @@ BOOL WINAPI WTSEnumerateServersW(LPWSTR pDomainName, DWORD Reserved, DWORD Versi
 BOOL WINAPI WTSEnumerateSessionsA(HANDLE hServer, DWORD Reserved, DWORD Version,
     PWTS_SESSION_INFOA* ppSessionInfo, DWORD* pCount)
 {
-    FIXME("Stub %p 0x%08x 0x%08x %p %p\n", hServer, Reserved, Version,
+    static int once;
+
+    if (!once++) FIXME("Stub %p 0x%08x 0x%08x %p %p\n", hServer, Reserved, Version,
           ppSessionInfo, pCount);
 
     if (!ppSessionInfo || !pCount) return FALSE;
@@ -153,7 +155,9 @@ BOOL WINAPI WTSEnumerateSessionsW(HANDLE hServer, DWORD Reserved, DWORD Version,
  */
 void WINAPI WTSFreeMemory(PVOID pMemory)
 {
-    FIXME("Stub %p\n", pMemory);
+    static int once;
+
+    if (!once++) FIXME("Stub %p\n", pMemory);
 }
 
 /************************************************************