diff --git a/src/graphics/irr_driver.cpp b/src/graphics/irr_driver.cpp
index 94b42451d..947f78a2a 100644
--- a/src/graphics/irr_driver.cpp
+++ b/src/graphics/irr_driver.cpp
@@ -1582,7 +1582,7 @@ void IrrDriver::doScreenShot()
     time ( &rawtime );
     tm* timeInfo = localtime( &rawtime );
     char time_buffer[256];
-    sprintf(time_buffer, "%i.%02i.%02i %02i.%02i.%02i",
+    sprintf(time_buffer, "%i.%02i.%02i_%02i.%02i.%02i",
             timeInfo->tm_year + 1900, timeInfo->tm_mon+1, 
             timeInfo->tm_mday, timeInfo->tm_hour, 
             timeInfo->tm_min, timeInfo->tm_sec);