diff --git a/content/xslt/src/base/txDouble.cpp b/content/xslt/src/base/txDouble.cpp
index e9663488e94..c1a7d2f33b3 100644
--- a/content/xslt/src/base/txDouble.cpp
+++ b/content/xslt/src/base/txDouble.cpp
@@ -154,7 +154,7 @@ public:
                     }
                     else {
                         mState = eIllegal;
-                        return aSourceLength;
+                        return;
                     }
                     break;
                 case eWhiteend: