diff --git a/src/video_rxtx/rtp.cpp b/src/video_rxtx/rtp.cpp
index 1ffb0bd72..d1328740c 100644
--- a/src/video_rxtx/rtp.cpp
+++ b/src/video_rxtx/rtp.cpp
@@ -252,7 +252,7 @@ void rtp_video_rxtx::display_buf_increase_warning(int size)
         fprintf(stderr, "\n***\n"
                         "Unable to set buffer size to %d B.\n"
 #if defined WIN32
-                        "See https://www.sitola.cz/igrid/index.php/Extending_Network_Buffers_%%28Windows%%29 for details.\n"
+                        "See https://www.sitola.cz/igrid/index.php/Extending_Network_Buffers_%%28Windows%%29 for details.\n",
 #else
                         "Please set net.core.rmem_max value to %d or greater. (see also\n"
                         "https://www.sitola.cz/igrid/index.php/OS_Setup_UltraGrid)\n"