diff --git a/lsteamclient/steamclient_main.c b/lsteamclient/steamclient_main.c
index 9babce07..0ca40aa6 100644
--- a/lsteamclient/steamclient_main.c
+++ b/lsteamclient/steamclient_main.c
@@ -28,6 +28,7 @@ char g_tmppath[PATH_MAX];
 static char *controller_glyphs[512]; /* at least k_EControllerActionOrigin_Count */
 
 static CRITICAL_SECTION steamclient_cs = { NULL, -1, 0, 0, 0, 0 };
+static HANDLE steam_overlay_event;
 
 BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, void *reserved)
 {
@@ -37,6 +38,10 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, void *reserved)
     {
         case DLL_PROCESS_ATTACH:
             DisableThreadLibraryCalls(instance);
+            steam_overlay_event = CreateEventA(NULL, TRUE, FALSE, "__wine_steamclient_GameOverlayActivated");
+            break;
+        case DLL_PROCESS_DETACH:
+            CloseHandle(steam_overlay_event);
             break;
     }
 
@@ -554,6 +559,15 @@ bool CDECL Steam_BGetCallback(HSteamPipe pipe, struct winCallbackMsg_t *win_msg,
         BOOL need_free = TRUE;
         win_msg->m_hSteamUser = lin_msg.m_hSteamUser;
         win_msg->m_iCallback = lin_msg.m_iCallback;
+
+        if (win_msg->m_iCallback == 0x14b) /* GameOverlayActivated_t::k_iCallback */
+        {
+            uint8 activated = *(uint8 *)lin_msg.m_pubParam;
+            TRACE("steam overlay %sactivated, %sabling all X11 events.\n", activated ? "" : "de", activated ? "dis" : "en");
+            if (activated) SetEvent(steam_overlay_event);
+            else ResetEvent(steam_overlay_event);
+        }
+
         switch(win_msg->m_iCallback | (lin_msg.m_cubParam << 16)){
 #include "cb_converters.dat"
             default: