diff --git a/source/src/serverfiles.h b/source/src/serverfiles.h
index f28be208..0bb376da 100644
--- a/source/src/serverfiles.h
+++ b/source/src/serverfiles.h
@@ -237,7 +237,7 @@ float Mheight = 0;
 
 bool mapisok(mapstats *ms)
 {
-    if ( Mheight > MAXMHEIGHT ) { logline(ACLOG_INFO, "MAP CHECK FAIL: The overall ceil height is too high (%d cubes)", Mheight); return false; }
+    if ( Mheight > MAXMHEIGHT ) { logline(ACLOG_INFO, "MAP CHECK FAIL: The overall ceil height is too high (%.1f cubes)", Mheight); return false; }
     if ( Mopen > MAXMAREA ) { logline(ACLOG_INFO, "MAP CHECK FAIL: There is a big open area in this (hint: use more solid walls)", Mheight); return false; }
 
     if ( ms->hasflags ) // Check if flags are ok