diff --git a/dlls/qcap/vfwcapture.c b/dlls/qcap/vfwcapture.c
index 5d128f2e2f4..efae931c381 100644
--- a/dlls/qcap/vfwcapture.c
+++ b/dlls/qcap/vfwcapture.c
@@ -374,6 +374,7 @@ AMStreamConfig_GetNumberOfCapabilities( IAMStreamConfig *iface, int *piCount,
                                         int *piSize )
 {
     FIXME("%p: %p %p - stub, intentional\n", iface, piCount, piSize);
+    *piCount = 0;
     return E_NOTIMPL; /* Not implemented for this interface */
 }