diff --git a/modulefiles/gaea_c5.lua b/modulefiles/gaea-c5.lua
similarity index 100%
rename from modulefiles/gaea_c5.lua
rename to modulefiles/gaea-c5.lua
diff --git a/tests/detect_machine.sh b/tests/detect_machine.sh
index 79b5f11f9..997e550dc 100755
--- a/tests/detect_machine.sh
+++ b/tests/detect_machine.sh
@@ -42,7 +42,7 @@ case $(hostname -f) in
   gaea15.ncrc.gov)         MACHINE_ID=gaea ;; ### gaea15
   gaea16.ncrc.gov)         MACHINE_ID=gaea ;; ### gaea16
 
-  gaea5[0-9]*)             MACHINE_ID=gaea_c5 ;; ### GAEA C5 login node
+  gaea5[0-9]*)             MACHINE_ID=gaea-c5 ;; ### GAEA C5 login node
 
   hfe01)                   MACHINE_ID=hera ;; ### hera01
   hfe02)                   MACHINE_ID=hera ;; ### hera02