diff --git a/JavaScriptCore/ChangeLog b/JavaScriptCore/ChangeLog
index 9278714d3c9b4ca2f9ad753ac2cd0de78dc8fddb..122b461c5ccb74704676469b30191c8058d6dc6e 100644
--- a/JavaScriptCore/ChangeLog
+++ b/JavaScriptCore/ChangeLog
@@ -1,3 +1,13 @@
+2007-11-11  Mike Hommey  <mh+webkit@glandium.org>
+
+        Reviewed by Maciej.
+
+        Fix http://bugs.webkit.org/show_bug.cgi?id=14521
+        Bug 14521: JavaScriptCore fails to build on Linux/PPC gcc 4.1.2
+
+        * wtf/TCSpinLock.h:
+        (TCMalloc_SpinLock::Unlock): Change constraint from o to m.
+
 2007-11-11  Mark Rowe  <mrowe@apple.com>
 
         Build fix.  Use the correct filename case.
diff --git a/JavaScriptCore/wtf/TCSpinLock.h b/JavaScriptCore/wtf/TCSpinLock.h
index 273cdc047656fcb6b4a693083bdfa67e240d5b1d..0bef1b899e25e31cecf0d2b7d217db89f3765ba7 100644
--- a/JavaScriptCore/wtf/TCSpinLock.h
+++ b/JavaScriptCore/wtf/TCSpinLock.h
@@ -106,7 +106,7 @@ struct TCMalloc_SpinLock {
       ("isync\n\t"
        "eieio\n\t"
        "stw %1, %0"
-       : "=o" (private_lockword_) 
+       : "=m" (private_lockword_)
        : "r" (0)
        : "memory");
 #endif