diff --git a/dcc/config.py b/dcc/config.py
index 9aaae33..de71990 100644
--- a/dcc/config.py
+++ b/dcc/config.py
@@ -24,7 +24,7 @@ def DsdaPreamble(wad, mapstr):
 	iwadpath = pwadpath.joinpath("iwad")
 	if iwadpath.exists():
 		with io.open(iwadpath) as f:
-			iwad = f.read().strip() + ".WAD"
+			iwad = IWADS.joinpath(f.read().strip() + ".WAD")
 	args = args + ["-iwad", iwad]
 
 	wads = sorted(pwadpath.glob('*.wad', case_sensitive=False))