diff --git a/taglib/mpeg/xingheader.cpp b/taglib/mpeg/xingheader.cpp
index e2bb7bed..b6100976 100644
--- a/taglib/mpeg/xingheader.cpp
+++ b/taglib/mpeg/xingheader.cpp
@@ -88,7 +88,7 @@ void MPEG::XingHeader::parse(const ByteVector &data)
 
     // Xing header found.
 
-    if(data.size() < static_cast<unsigned long>(offset + 16)) {
+    if(data.size() < static_cast<unsigned long>(offset) + 16) {
       debug("MPEG::XingHeader::parse() -- Xing header found but too short.");
       return;
     }
@@ -112,7 +112,7 @@ void MPEG::XingHeader::parse(const ByteVector &data)
 
       // VBRI header found.
 
-      if(data.size() < static_cast<unsigned long>(offset + 32)) {
+      if(data.size() < static_cast<unsigned long>(offset) + 32) {
         debug("MPEG::XingHeader::parse() -- VBRI header found but too short.");
         return;
       }