1 files changed, 2 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index be1b32b..8bd89f1 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,9 @@ CC = g++
 CFLAGS = -Wall -pedantic
 LDFLAGS = -ltbb -lglut -lGLU -lGL
 
-balls: balls.o
+balls: balls.o collision.o
 	${CC} -o $@ $^ ${LDFLAGS}
 	@echo done
 
-%.o: %.cpp
+%.o: %.cpp balls.h
 	${CC} -c ${CFLAGS} $<
\ No newline at end of file