diff --git a/components/prism-bash.js b/components/prism-bash.js
index 6d2e3815c2..ea6b97b3fb 100644
--- a/components/prism-bash.js
+++ b/components/prism-bash.js
@@ -115,7 +115,7 @@
 		},
 		// Highlight parameter names as variables
 		'parameter': {
-			pattern: /(^|\s)-{1,2}(?:\w+:[+-]?)?\w+(?:\.\w+)*(?=[=\s]|$)/,
+			pattern: /(^|\s)-{1,2}(?:\w+:[+-]?)?\w+(?:[.-]\w+)*(?=[=\s]|$)/,
 			alias: 'variable',
 			lookbehind: true
 		},
diff --git a/tests/languages/bash/parameter_feature.test b/tests/languages/bash/parameter_feature.test
index 000a040703..f0ca0ee685 100644
--- a/tests/languages/bash/parameter_feature.test
+++ b/tests/languages/bash/parameter_feature.test
@@ -1,5 +1,6 @@
 docker run
 --name elk \
+--log-level info \
 -p 5601:5601 \
 --restart=always \
 --privileged \
@@ -16,6 +17,10 @@ easyj/elk:7.12.1
 	" elk ",
 	["punctuation", "\\"],
 
+	["parameter", "--log-level"],
+	" info ",
+	["punctuation", "\\"],
+
 	["parameter", "-p"],
 	["number", "5601"],
 	":5601 ",