diff --git a/lib/i18n/tasks/scanners/base_scanner.rb b/lib/i18n/tasks/scanners/base_scanner.rb
index 14171f0a..6212b798 100644
--- a/lib/i18n/tasks/scanners/base_scanner.rb
+++ b/lib/i18n/tasks/scanners/base_scanner.rb
@@ -119,7 +119,7 @@ def strip_literal(literal)
       key
     end
 
-    VALID_KEY_RE = /^[\w.\#{}]+$/
+    VALID_KEY_RE = /^[-\w.\#{}]+$/
 
     def valid_key?(key)
       key =~ VALID_KEY_RE && !(@key_filter && @key_filter_pattern !~ key)
diff --git a/spec/fixtures/app/views/index.html.slim b/spec/fixtures/app/views/index.html.slim
index eb219497..ebd51fac 100644
--- a/spec/fixtures/app/views/index.html.slim
+++ b/spec/fixtures/app/views/index.html.slim
@@ -2,6 +2,7 @@ p #{t('ca.a')} #{t 'ca.b'} #{t "ca.c"}
 p #{t 'ca.d'} #{t 'ca.f', i: 'world'} #{t 'ca.e', i: 'world'}
 p #{t 'missing_in_es.a'} #{t 'same_in_es.a'} #{t 'blank_in_es.a'}
 p = t 'used_but_missing.key'
+p = t 'missing-key-with-a-dash.key'
 p = t 'x', scope: 'scoped'
 p = t 'x', scope: [:very, :scoped]
 p = t 'x', scope: [:scoped, code]
diff --git a/spec/i18n_tasks_spec.rb b/spec/i18n_tasks_spec.rb
index 017db65a..c95976e7 100644
--- a/spec/i18n_tasks_spec.rb
+++ b/spec/i18n_tasks_spec.rb
@@ -12,7 +12,9 @@
           es.missing_in_es.a es.same_in_es.a
           en.hash.pattern_missing.a en.hash.pattern_missing.b
           en.missing_symbol_key en.missing_symbol.key_two en.missing_symbol.key_three
-          es.missing_in_es_plural_1.a es.missing_in_es_plural_2.a)
+          es.missing_in_es_plural_1.a es.missing_in_es_plural_2.a
+          en.missing-key-with-a-dash.key
+        )
     }
     it 'detects missing or identical' do
       capture_stderr do