diff --git a/tips/TIP-0048/openapi3-core.yaml b/tips/TIP-0048/openapi3-core.yaml
index f1279f4a2..168d7c506 100644
--- a/tips/TIP-0048/openapi3-core.yaml
+++ b/tips/TIP-0048/openapi3-core.yaml
@@ -1152,7 +1152,7 @@ paths:
       description: Look up a commitment by a given commitment index.
       parameters:
         - in: path
-          name: index
+          name: slot
           schema:
             type: integer
           example: 154862
@@ -1210,7 +1210,7 @@ paths:
       description: Get all UTXO changes of a given slot by commitment index.
       parameters:
         - in: path
-          name: index
+          name: slot
           schema:
             type: integer
           example: 154862
@@ -1259,7 +1259,7 @@ paths:
       description: Get all UTXO changes of a given slot index.
       parameters:
         - in: path
-          name: index
+          name: slot
           schema:
             type: integer
           example: 154862