diff --git a/hcl.nanorc b/hcl.nanorc
index 0afb8cb..f02308b 100644
--- a/hcl.nanorc
+++ b/hcl.nanorc
@@ -4,7 +4,7 @@
 # Original author:  John Boero
 # License:  GPLv3 or newer
 
-syntax "Hcl" "\.(tf|hcl)$"
+syntax "hcl" "\.(tf|hcl)$"
 # No comments are permitted in JSON.
 comment ""
 
diff --git a/prolog.nanorc b/prolog.nanorc
index 3887c60..c834991 100644
--- a/prolog.nanorc
+++ b/prolog.nanorc
@@ -1,6 +1,6 @@
 ## Here is a prolog example.
 
-syntax "Prolog" "\.pl"
+syntax "prolog" "\.pl"
 comment "%"
 
 # Reset everything