diff --git a/matrix/make_gen b/matrix/make_gen
index 992e1d54..4d142e12 100644
--- a/matrix/make_gen
+++ b/matrix/make_gen
@@ -14,5 +14,4 @@ libmatrix.a: $(OBJ)
 	ranlib libmatrix.a
 
 clean:
-	rm -f *.o
-	rm -f *.a
+	rm -f *.o *.a *.d
diff --git a/matrix/makefile_linux b/matrix/makefile_linux
index addaf48b..2021c24c 100644
--- a/matrix/makefile_linux
+++ b/matrix/makefile_linux
@@ -9,6 +9,9 @@
 include ../linux_def
 
 CC       = gcc
-CFLAGS   = -g $(DFORTIFY)
+CFLAGS   = -g $(DFORTIFY) -MMD
 
 include make_gen
+
+-include $(OBJ:.o=.d)
+