diff --git a/conf/jcs/jcs.conf b/conf/jcs/jcs.conf
index ef2e5c15..bfffbff0 100644
--- a/conf/jcs/jcs.conf
+++ b/conf/jcs/jcs.conf
@@ -1,4 +1,4 @@
-jcs_dir=$HOME/local/src/jw.dev/conf/`hostname -d`/`hostname -s`/`/opt/jw-build/bin/get_os.sh`
+jcs_dir=$HOME/local/src/jw.dev/conf/`hostname -d`/`hostname -s`/`/opt/jw-build/bin/get-os.sh`
 jcs_owner=root
 jcs_group=root
 jcs_log_dir=$jcs_dir/log
diff --git a/make/defs.mk b/make/defs.mk
index 60ff1eff..7e145eef 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -39,7 +39,7 @@ ifeq ($(PROJECT),)
   PROJECT             := $(patsubst $(FLAVOUR_PREFIX)%,%,$(notdir $(shell cd $(TOPDIR); pwd | $(SED) 's/.*\///; s/-[0-9].*//')))
 endif
 
-OS                    ?= $(shell sh $(MOD_SCRIPT_DIR)/get_os.sh)
+OS                    ?= $(shell sh $(MOD_SCRIPT_DIR)/get-os.sh)
 
 CREATE_DEVEL          ?= true
 #COMPILER_SUITE        ?= clang
diff --git a/make/smart-selection.mk b/make/smart-selection.mk
index 8fbdd210..688ee09d 100644
--- a/make/smart-selection.mk
+++ b/make/smart-selection.mk
@@ -1,5 +1,5 @@
 # === variable definitions
-GET_OS_SH               = sh $(MOD_SCRIPT_DIR)/get_os.sh
+GET_OS_SH               = sh $(MOD_SCRIPT_DIR)/get-os.sh
 GENERATE_SELECTION      = sh $(MOD_SCRIPT_DIR)/generate_selection.sh
 UPLOAD_SH               = sh $(MOD_SCRIPT_DIR)/upload.sh
 
diff --git a/scripts/get_os.sh b/scripts/get-os.sh
old mode 100644
new mode 100755
similarity index 100%
rename from scripts/get_os.sh
rename to scripts/get-os.sh
diff --git a/scripts/jcs b/scripts/jcs
index 729ebe68..252ce09b 100644
--- a/scripts/jcs
+++ b/scripts/jcs
@@ -2037,7 +2037,7 @@ JNT_JCSDIR=/tmp
 --<<<-- jcs.conf.oldstyle --
 
 -->>>-- jcs.conf --
-jcs_dir=$HOME/local/src/jw.dev/conf/`hostname -d`/`hostname -s`/`/opt/jw-build/bin/get_os.sh`
+jcs_dir=$HOME/local/src/jw.dev/conf/`hostname -d`/`hostname -s`/`/opt/jw-build/bin/get-os.sh`
 jcs_owner=root
 jcs_group=root
 jcs_log_dir=$jcs_dir/log
diff --git a/scripts/pkg.sh b/scripts/pkg.sh
index df9098c7..6ebf0c25 100644
--- a/scripts/pkg.sh
+++ b/scripts/pkg.sh
@@ -36,7 +36,7 @@ fatal()
 
 os()
 {
-	/bin/bash $MOD_SCRIPT_DIR/get_os.sh
+	/bin/bash $MOD_SCRIPT_DIR/get-os.sh
 }
 
 scm_commit()
diff --git a/scripts/projects.py b/scripts/projects.py
index 2bbe1327..3b506488 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -45,7 +45,7 @@ def remove_duplicates(seq):
 
 def get_os(args = ""):
     for d in [ projs_root + '/jw-build/scripts', '/opt/jw-build/bin' ]:
-        script = d + '/get_os.sh'
+        script = d + '/get-os.sh'
         if isfile(script):
             cmd = '/bin/bash ' + script
             if args: