diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 4dbe1733ffd..69d71a321ee 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -2584,10 +2584,10 @@ files {
 	MAME_DIR .. "src/mame/drivers/fb01.c",
 }
 dependency {
-	{ MAME_DIR .. "src/mame/drivers/ymmu100.c",    GEN_DIR .. "mess/drivers/ymmu100.inc" },
+	{ MAME_DIR .. "src/mame/drivers/ymmu100.c",    GEN_DIR .. "mame/drivers/ymmu100.inc" },
 }
 custombuildtask {
-	{ MAME_DIR .. "src/mame/drivers/ymmu100.ppm", GEN_DIR .. "mess/drivers/ymmu100.inc",  {  MAME_DIR .. "src/build/file2str.py" }, {"@echo Converting src/drivers/ymmu100.ppm...", PYTHON .. " $(1) $(<) $(@) ymmu100_bkg UINT8" }},
+	{ MAME_DIR .. "src/mame/drivers/ymmu100.ppm", GEN_DIR .. "mame/drivers/ymmu100.inc",  {  MAME_DIR .. "src/build/file2str.py" }, {"@echo Converting src/drivers/ymmu100.ppm...", PYTHON .. " $(1) $(<) $(@) ymmu100_bkg UINT8" }},
 }
 
 createMESSProjects(_target, _subtarget, "zenith")