diff --git a/package.json b/package.json
index f72099ab..43c722f6 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "generatedUnitTests": true,
     "supportsSound": true,
     "supportsEnhancedSound": true,
-    "supportsInteractiveDescriptions": true,
+    "supportsInteractiveDescription": true,
     "supportedBrands": [
       "phet",
       "adapted-from-phet"
diff --git a/ratio-and-proportion-tests.html b/ratio-and-proportion-tests.html
index 13d6f945..881d151c 100644
--- a/ratio-and-proportion-tests.html
+++ b/ratio-and-proportion-tests.html
@@ -42,7 +42,7 @@
         "generatedUnitTests": true,
         "supportsSound": true,
         "supportsEnhancedSound": true,
-        "supportsInteractiveDescriptions": true,
+        "supportsInteractiveDescription": true,
         "supportedBrands": [
           "phet",
           "adapted-from-phet"
diff --git a/ratio-and-proportion_a11y_view.html b/ratio-and-proportion_a11y_view.html
index 668fdcc1..8dcb2bfa 100644
--- a/ratio-and-proportion_a11y_view.html
+++ b/ratio-and-proportion_a11y_view.html
@@ -224,10 +224,10 @@ <h3>PDOM & Descriptions for Ratio and Proportion</h3>
   }
 
   const noPostMessage = simulationQueryString.indexOf( 'postMessageOnLoad&postMessageOnError' ) === -1;
-  const noAccessibility = simulationQueryString.indexOf( 'supportsDescriptions' ) === -1;
+  const noAccessibility = simulationQueryString.indexOf( 'supportsDescription' ) === -1;
 
   noPostMessage && ( simulationQueryString += 'postMessageOnLoad&postMessageOnError&' );
-  noAccessibility && ( simulationQueryString += 'supportsDescriptions' );
+  noAccessibility && ( simulationQueryString += 'supportsDescription' );
 
   const repoLocale = 'ratio-and-proportion_en';
   const filenameEnding = IS_BUILT ? '_phet.html' : '.html';
diff --git a/ratio-and-proportion_en.html b/ratio-and-proportion_en.html
index fc404296..e1248f83 100644
--- a/ratio-and-proportion_en.html
+++ b/ratio-and-proportion_en.html
@@ -41,7 +41,7 @@
         "generatedUnitTests": true,
         "supportsSound": true,
         "supportsEnhancedSound": true,
-        "supportsInteractiveDescriptions": true,
+        "supportsInteractiveDescription": true,
         "supportedBrands": [
           "phet",
           "adapted-from-phet"