diff --git a/arithmetic_progressions/Makefile b/arithmetic_progressions/Makefile
index 461b0f8..47ae4b8 100644
--- a/arithmetic_progressions/Makefile
+++ b/arithmetic_progressions/Makefile
@@ -4,7 +4,7 @@ CFLAGS= -ggdb --std=c11
 
 all: ap
 
-segtree.o: segtree.c
+%.o: %.c
 	$(CC) -o $@ -c $^ $(CFLAGS)
 
 ap: arithmetic_progressions.c segtree.o