diff --git a/mozilla/content/base/src/nsLineBreaker.cpp b/mozilla/content/base/src/nsLineBreaker.cpp
index ddb95aa606b..01744a99d7e 100644
--- a/mozilla/content/base/src/nsLineBreaker.cpp
+++ b/mozilla/content/base/src/nsLineBreaker.cpp
@@ -164,7 +164,7 @@ nsLineBreaker::AppendText(nsIAtom* aLangGroup, const PRUnichar* aText, PRUint32
     PRBool isSpace = IS_SPACE(ch);
 
     breakState[offset] = mAfterSpace && !isSpace &&
-      (aFlags & (start == 0 ? BREAK_ALLOW_INITIAL : BREAK_ALLOW_INSIDE));
+      (aFlags & (offset == 0 ? BREAK_ALLOW_INITIAL : BREAK_ALLOW_INSIDE));
     mAfterSpace = isSpace;
 
     if (isSpace) {
@@ -254,7 +254,7 @@ nsLineBreaker::AppendText(nsIAtom* aLangGroup, const PRUint8* aText, PRUint32 aL
     PRBool isSpace = IS_SPACE(ch);
 
     breakState[offset] = mAfterSpace && !isSpace &&
-      (aFlags & (start == 0 ? BREAK_ALLOW_INITIAL : BREAK_ALLOW_INSIDE));
+      (aFlags & (offset == 0 ? BREAK_ALLOW_INITIAL : BREAK_ALLOW_INSIDE));
     mAfterSpace = isSpace;
 
     if (isSpace) {