--- old/make/jprt.properties	2015-07-06 05:04:52.085258985 -0400
+++ new/make/jprt.properties	2015-07-06 05:04:50.833187676 -0400
@@ -61,7 +61,7 @@
 
 # Use these configure args to define debug level
 jprt.debug.build.configure.args=--with-debug-level=slowdebug
-jprt.fastdebug.build.configure.args=--with-debug-level=fastdebug
+jprt.fastdebug.build.configure.args=--with-debug-level=fastdebug --disable-precompiled-headers
 jprt.product.build.configure.args=--with-debug-level=release
 jprt.optimized.build.configure.args=--with-debug-level=optimized
 jprt.debugOpen.build.configure.args=${jprt.debug.build.configure.args} --enable-openjdk-only