diff --git a/dist/tools/cppcheck/check.sh b/dist/tools/cppcheck/check.sh
index 9c2a63c173..6e04ab600a 100755
--- a/dist/tools/cppcheck/check.sh
+++ b/dist/tools/cppcheck/check.sh
@@ -1,5 +1,12 @@
 #!/bin/sh
 
+# Copyright 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
+# Copyright 2014 Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
 # Don't show warnings about unusedStructMembers by default
 DEFAULT_SUPPRESSIONS="${1}"
 if echo "${DEFAULT_SUPPRESSIONS}" | grep -q '^--show-unused-struct'; then
diff --git a/dist/tools/externc/check.sh b/dist/tools/externc/check.sh
index 7311be26b5..fa415740e7 100755
--- a/dist/tools/externc/check.sh
+++ b/dist/tools/externc/check.sh
@@ -1,5 +1,12 @@
 #!/bin/sh
 
+# Copyright 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
+# Copyright 2014 DangNhat Pham-Huu <51002279@hcmut.edu.vn>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
 # customizable
 CHECKROOT=$(dirname "${0}")
 
diff --git a/dist/tools/licenses/check.sh b/dist/tools/licenses/check.sh
index 0ebd94bb93..12d34259fd 100755
--- a/dist/tools/licenses/check.sh
+++ b/dist/tools/licenses/check.sh
@@ -1,5 +1,11 @@
 #!/bin/sh
 
+# Copyright 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
 # customizable
 CHECKROOT=$(dirname "${0}")
 LICENSEDIR="${CHECKROOT}/patterns"