diff --git a/build/buildbot/config/csleobuild.xml b/build/buildbot/config/csleobuild.xml
index 5442d1a436..5c246f429f 100644
--- a/build/buildbot/config/csleobuild.xml
+++ b/build/buildbot/config/csleobuild.xml
@@ -16,7 +16,7 @@
     <xsl:variable name="CLANGOPTIONS" select="'-Qunused-arguments -Wno-parentheses-equality -Wno-self-assign -Wno-unused-function -Wno-deprecated-declarations'"/>
     <xsl:variable name="CLANGOPTIONS32" select="'-Qunused-arguments -Wno-parentheses-equality -Wno-self-assign -Wno-unused-function -Wno-deprecated-declarations -arch i386'"/>
     <xsl:variable name="CLANGOPTIONIOSSIM" select="'-Qunused-arguments -Wno-parentheses-equality -Wno-self-assign -Wno-unused-function -Wno-deprecated-declarations -arch x86_64'"/>
-    <xsl:variable name="SDK106" select="'--with-macosx-version-min=10.5 --with-macosx-sdk=/Developer/SDKs/MacOSX10.6.sdk'"/>
+    <xsl:variable name="SDK106" select="'--with-macosx-version-min=10.5 --with-macosx-sdk=/Developer/SDKs/MacOSX10.6.sdk --with-cppunit-prefix=/Developer/libstdc++variants/cppunit'"/>
     <xsl:variable name="SDKCURRENT" select="'--with-macosx-version-min=10.7 --with-cppunit-prefix=/Developer/libc++variants/cppunit'"/>
     <xsl:variable name="SDKCURRENTIOSSIM" select="'--with-macosx-version-min=7.1 --with-macosx-sdk=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk'"/>