diff --git a/Makefile b/Makefile
index 54068dfe30e..17043787e38 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,10 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
+# *******************************************************
+# WARNING! If you edit this file, also edit Makefile.win!
+# *******************************************************
+
 include version.mk
 
 REBAR?=$(shell echo `pwd`/bin/rebar)
diff --git a/Makefile.win b/Makefile.win
index 7b7f805e78f..99ec71278c5 100644
--- a/Makefile.win
+++ b/Makefile.win
@@ -2,7 +2,7 @@
 # use this file except in compliance with the License. You may obtain a copy of
 # the License at
 #
-#   http:\\www.apache.org\licenses\LICENSE-2.0
+#   http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
@@ -10,6 +10,10 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
+# ***************************************************
+# WARNING! If you edit this file, also edit Makefile!
+# ***************************************************
+
 include version.mk
 
 SHELL=cmd.exe