diff --git a/Makefile b/Makefile
index 558687b..5d929d9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,12 @@
-CC = gcc
-CFLAGS = -Wall -pedantic
-LDFLAGS = -lm
-BIN = graph.exe
-OBJ = errors.o lex.o main.o math_functions.o parser.o ps_graph.o tree.o
-
-%.o: %.c
-	$(CC) -c $(CFLAGS) $< -o $@
-
-$(BIN): $(OBJ)
-	$(CC) $^ -o $@ $(LDFLAGS)
-
+CC = gcc
+CFLAGS = -Wall -pedantic
+LDFLAGS = -lm
+BIN = graph.exe
+OBJ = errors.o lex.o main.o math_functions.o parser.o ps_graph.o tree.o
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@
+
+$(BIN): $(OBJ)
+	$(CC) $^ -o $@ $(LDFLAGS)
+
diff --git a/Makefile.win b/Makefile.win
index dfbea6f..c08f987 100644
--- a/Makefile.win
+++ b/Makefile.win
@@ -1,9 +1,9 @@
-BIN = graph.exe
-OBJ = errors.o lex.o main.o math_functions.o parser.o ps_graph.o tree.o
-
-.c.obj:
-	cl $< /c
-
-$(BIN): $(OBJ)
-	cl $(OBJ) /Fe$(BIN)
-
+BIN = graph.exe
+OBJ = errors.obj lex.obj main.obj math_functions.obj parser.obj ps_graph.obj tree.obj
+
+.c.obj:
+	cl $< /c
+
+$(BIN): $(OBJ)
+	cl $(OBJ) /Fe$(BIN)
+