1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index c8afd3685..a7da3ac32 100644
--- a/Makefile
+++ b/Makefile
@@ -697,6 +697,7 @@ SRCS += network_udp.c
 SRCS += newgrf.c
 SRCS += newgrf_cargo.c
 SRCS += newgrf_engine.c
+SRCS += newgrf_sound.c
 SRCS += newgrf_spritegroup.c
 SRCS += newgrf_station.c
 SRCS += newgrf_text.c