diff --git a/samples/html/Makefile.in b/samples/html/Makefile.in
index 69d9346911..5ff75e2764 100644
--- a/samples/html/Makefile.in
+++ b/samples/html/Makefile.in
@@ -3,22 +3,22 @@
 #
 
 all:
-	cd about && make
-	cd help && make
-	cd helpview && make
-	cd printing && make
-	cd test && make
-	cd virtual && make
-	cd widget && make
-	cd zip && make
+	cd about && $(MAKE)
+	cd help && $(MAKE)
+	cd helpview && $(MAKE)
+	cd printing && $(MAKE)
+	cd test && $(MAKE)
+	cd virtual && $(MAKE)
+	cd widget && $(MAKE)
+	cd zip && $(MAKE)
 
 clean:
-	cd about && make clean
-	cd help && make clean
-	cd helpview && make clean
-	cd printing && make clean
-	cd test && make clean
-	cd virtual && make clean
-	cd widget && make clean
-	cd zip && make clean
+	cd about && $(MAKE) clean
+	cd help && $(MAKE) clean
+	cd helpview && $(MAKE) clean
+	cd printing && $(MAKE) clean
+	cd test && $(MAKE) clean
+	cd virtual && $(MAKE) clean
+	cd widget && $(MAKE) clean
+	cd zip && $(MAKE) clean
 
diff --git a/samples/opengl/Makefile.in b/samples/opengl/Makefile.in
index afef44caeb..07dd0ddf17 100644
--- a/samples/opengl/Makefile.in
+++ b/samples/opengl/Makefile.in
@@ -3,13 +3,13 @@
 #
 
 all:
-	cd penguin && make
-	cd cube && make
-	cd isosurf && make
+	cd penguin && $(MAKE)
+	cd cube && $(MAKE)
+	cd isosurf && $(MAKE)
 
 clean:
-	cd penguin && make clean
-	cd cube && make clean
-	cd isosurf && make clean
+	cd penguin && $(MAKE) clean
+	cd cube && $(MAKE) clean
+	cd isosurf && $(MAKE) clean