diff --git a/app/classes/Transvision/AnalyseStrings.php b/app/classes/Transvision/AnalyseStrings.php
index a2fa8b8f..830691cb 100644
--- a/app/classes/Transvision/AnalyseStrings.php
+++ b/app/classes/Transvision/AnalyseStrings.php
@@ -57,7 +57,7 @@ public static function differences($tmx_source, $tmx_target, $repo, $ignored_str
             // %1$S or %S. %1$0.S and %0.S are valid too
             'printf'      => '/(%(?:[0-9]+\$){0,1}(?:[0-9].){0,1}([sS]))/',
             // $BrandShortName, but not "My%1$SFeeds-%2$S.opml" or "{ $brandShortName }"
-            'properties'  => '/(?<!%[0-9]|\{\s|\{)(\$[A-Za-z0-9\._-]+)\b/',
+            'properties'  => '/(?<!%[0-9]|\{\s|\{)(\$[A-Za-z0-9\.]+)\b/',
             // %1$s or %s. %d
             'xml_android' => '/(%(?:[0-9]+\$){0,1}([sd]))/',
             // %1, %2, etc.
diff --git a/tests/units/Transvision/AnalyseStrings.php b/tests/units/Transvision/AnalyseStrings.php
index 0d34d247..59e3eed4 100644
--- a/tests/units/Transvision/AnalyseStrings.php
+++ b/tests/units/Transvision/AnalyseStrings.php
@@ -259,6 +259,30 @@ public function differencesDP()
                 [],
                 [],
             ],
+            [
+                // $brand variables in .properties
+                ['browser:foobar17' => 'Are you sure you want to quit $BrandFullName Setup?'],
+                ['browser:foobar17' => 'Da li ste sigurni da želite ugasiti $BrandFullName instalaciju?'],
+                'gecko_strings',
+                [],
+                [],
+            ],
+            [
+                // Missing $brand variables in .properties
+                ['browser:foobar17a' => 'Are you sure you want to quit $BrandFullName Setup?'],
+                ['browser:foobar17a' => 'Da li ste sigurni da želite ugasiti instalaciju?'],
+                'gecko_strings',
+                [],
+                ['browser:foobar17a'],
+            ],
+            [
+                // $brand variables in .properties with added text, not an error
+                ['browser:foobar17a' => 'Are you sure you want to quit $BrandFullName Setup?'],
+                ['browser:foobar17a' => 'Wil u definitief die $BrandFullName-opsteller afsluit?'],
+                'gecko_strings',
+                [],
+                [],
+            ],
             [
                 // Mispelled variable
                 ['iostest:foobar1' => 'Introductory slide %1$@ of %2$@'],