diff --git a/utilities.sh b/utilities.sh
index 99c2b9b..eed3562 100644
--- a/utilities.sh
+++ b/utilities.sh
@@ -41,6 +41,14 @@ line_exists_or_append() {
   fi
 }
 # Print a debug message to stdout
+# Takes arguments in the form:
+#   dbg_msg application-name [severity] message
+#
+# Application name and message are mandatory.
+# Severity level should be one of
+# error | warn | info
+# in decreasing severity.
+# If no severity level is applied, it defaults to info.
 dbg_msg() {
   local application="$1"
   shift