diff --git a/src/screenshot.c b/src/screenshot.c
index 4299b8b..88d559c 100644
--- a/src/screenshot.c
+++ b/src/screenshot.c
@@ -151,7 +151,7 @@ BOOL ss_take_screenshot(IDirectDrawSurfaceImpl* src)
     CreateDirectoryA(g_config.screenshot_dir, NULL);
 
     strftime(str_time, sizeof(str_time), "%Y-%m-%d_%H-%M-%S", localtime(&t));
-    _snprintf(filename, sizeof(filename) - 1, "%s%s-%s.png", g_config.screenshot_dir, title, str_time);
+    _snprintf(filename, sizeof(filename) - 1, "%s%s_%s.png", g_config.screenshot_dir, title, str_time);
 
     if (src->bpp == 8 && src->palette)
     {