diff --git a/build.xml b/build.xml
index 7d8b021b..0fc31cfb 100644
--- a/build.xml
+++ b/build.xml
@@ -684,6 +684,21 @@ osname=macosx;processor=x86;processor=x86-64;processor=ppc
     <condition property="make.SDKROOT" value="SDKROOT=${SDKROOT}">
       <isset property="SDKROOT"/>
     </condition>
+    <property name="xcode" value="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform"/>
+    <condition property="make.SDKROOT"
+	       value="SDKROOT=${xcode}/Developer/SDKs/MacOSX10.9.sdk">
+      <and>
+        <equals arg1="${os.prefix}" arg2="darwin" trim="true"/>
+        <available file="${xcode}/Developer/SDKs/MacOSX10.9.sdk"/>
+      </and>
+    </condition>
+    <condition property="make.SDKROOT"
+	       value="SDKROOT=${xcode}/Developer/SDKs/MacOSX10.8.sdk">
+      <and>
+        <equals arg1="${os.prefix}" arg2="darwin" trim="true"/>
+        <available file="${xcode}/Developer/SDKs/MacOSX10.8.sdk"/>
+      </and>
+    </condition>
     <condition property="make.SDKROOT"
 	       value="SDKROOT=/Developer/SDKs/MacOSX10.6.sdk">
       <and>