diff --git a/rbutil/rbutilqt/rbutilqt.pro b/rbutil/rbutilqt/rbutilqt.pro
index b95eee40b9..e414458996 100644
--- a/rbutil/rbutilqt/rbutilqt.pro
+++ b/rbutil/rbutilqt/rbutilqt.pro
@@ -174,6 +174,8 @@ unix:static {
 
 macx {
     QMAKE_MAC_SDK=/Developer/SDKs/MacOSX10.4u.sdk
+    QMAKE_LFLAGS_PPC=-mmacosx-version-min=10.4
+    QMAKE_LFLAGS_X86=-mmacosx-version-min=10.4
     CONFIG+=x86 ppc
     LIBS += -L/usr/local/lib -framework IOKit
     INCLUDEPATH += /usr/local/include