diff --git a/src/main/java/com/github/robtimus/net/protocol/data/MediaType.java b/src/main/java/com/github/robtimus/net/protocol/data/MediaType.java
index da50b48..7a4f83c 100644
--- a/src/main/java/com/github/robtimus/net/protocol/data/MediaType.java
+++ b/src/main/java/com/github/robtimus/net/protocol/data/MediaType.java
@@ -143,10 +143,7 @@ private static int parseNextParameter(String paramString, int start, int end, Ma
 
         int nameEnd = getNameEnd(paramString, start, end);
         String name = paramString.substring(start, nameEnd);
-        int valueStart = nameEnd;
-        if (valueStart < end && paramString.charAt(valueStart) == '=') {
-            valueStart++;
-        }
+        int valueStart = getValueStart(paramString, nameEnd, end);
 
         StringBuilder value = new StringBuilder(end - valueStart);
         for (int i = valueStart; i < end; i++) {
@@ -200,6 +197,14 @@ private static int getNameEnd(String params, int start, int end) {
         return Math.min(indexOfEquals, indexOfSemicolon);
     }
 
+    private static int getValueStart(String params, int start, int end) {
+        int valueStart = start;
+        if (valueStart < end && params.charAt(valueStart) == '=') {
+            valueStart++;
+        }
+        return valueStart;
+    }
+
     private static boolean isNotFound(int index) {
         return index == -1;
     }