diff --git a/Build/Compilers/Nodebuilders/zdbsp.cfg b/Build/Compilers/Nodebuilders/zdbsp.cfg
index 448bc52a..86c34aec 100644
--- a/Build/Compilers/Nodebuilders/zdbsp.cfg
+++ b/Build/Compilers/Nodebuilders/zdbsp.cfg
@@ -26,7 +26,8 @@ nodebuilders
 	{
 		title = "ZDBSP - Normal";
 		compiler = "zdbsp";
-		parameters = "-o%FO %FI";
+		parameters = "-c -o%FO %FI";
+		// -c adds comment indices in UDMF format. This is not documented in the ZDBSP usage.
 	}
 
 	zdbsp_fast
diff --git a/Build/Compilers/Nodebuilders/zdbsp.exe b/Build/Compilers/Nodebuilders/zdbsp.exe
index b3ad7854..494be809 100644
Binary files a/Build/Compilers/Nodebuilders/zdbsp.exe and b/Build/Compilers/Nodebuilders/zdbsp.exe differ