1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 0da359dcc..5d29b8bcb 100644
--- a/Makefile
+++ b/Makefile
@@ -707,6 +707,7 @@ SRCS += gfx.c
 SRCS += gfxinit.c
 SRCS += graph_gui.c
 SRCS += heightmap.c
+SRCS += helpers.cpp
 SRCS += industry_cmd.c
 SRCS += industry_gui.c
 SRCS += intro_gui.c