diff --git a/src/Makefile b/src/Makefile
index 3d57fb9..2741bcb 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -4,7 +4,7 @@
 CFLAGS = -lm -lSDL2_image `sdl2-config --cflags --libs` -lsodium
 
 columns: main.c
-	$(CC) main.c column.c research.c render.c backdrop.c -o columns $(CFLAGS)
+	$(CC) main.c column.c research.c render.c backdrop.c sdl.c events.c -o columns $(CFLAGS)
 
 clean:
 	rm columns