diff --git a/dlls/urlmon/umon.c b/dlls/urlmon/umon.c
index d3eb44e5ce5..3e43bb83d8e 100644
--- a/dlls/urlmon/umon.c
+++ b/dlls/urlmon/umon.c
@@ -612,7 +612,7 @@ HRESULT WINAPI CreateURLMonikerEx(IMoniker *pmkContext, LPCWSTR szURL, IMoniker
     if (!szURL || !ppmk)
         return E_INVALIDARG;
 
-    if(dwFlags > sizeof(create_flags_map)/sizeof(*create_flags_map)) {
+    if(dwFlags >= sizeof(create_flags_map)/sizeof(*create_flags_map)) {
         FIXME("Unsupported flags %x\n", dwFlags);
         return E_INVALIDARG;
     }
@@ -665,7 +665,7 @@ HRESULT WINAPI CreateURLMonikerEx2(IMoniker *pmkContext, IUri *pUri, IMoniker **
     if (!pUri || !ppmk)
         return E_INVALIDARG;
 
-    if(dwFlags > sizeof(create_flags_map)/sizeof(*create_flags_map)) {
+    if(dwFlags >= sizeof(create_flags_map)/sizeof(*create_flags_map)) {
         FIXME("Unsupported flags %x\n", dwFlags);
         return E_INVALIDARG;
     }