diff --git a/make/system-development.mk b/make/system-development.mk
index 7680204b..7246c267 100644
--- a/make/system-development.mk
+++ b/make/system-development.mk
@@ -1,5 +1,5 @@
 #
-# makefile to build development-tools
+# makefile to build development tools
 #
 # -----------------------------------------------------------------------------
 
diff --git a/make/system-ffmpeg-armbox.mk b/make/system-ffmpeg-armbox.mk
index 1d99bd7f..ecfd842b 100644
--- a/make/system-ffmpeg-armbox.mk
+++ b/make/system-ffmpeg-armbox.mk
@@ -1,5 +1,5 @@
 #
-# ffmpeg
+# makefile to build ffmpeg
 #
 # -----------------------------------------------------------------------------
 
diff --git a/make/system-ffmpeg-coolstream.mk b/make/system-ffmpeg-coolstream.mk
index 5f56ac50..df47b5ac 100644
--- a/make/system-ffmpeg-coolstream.mk
+++ b/make/system-ffmpeg-coolstream.mk
@@ -1,5 +1,5 @@
 #
-# ffmpeg
+# makefile to build ffmpeg
 #
 # -----------------------------------------------------------------------------