--- a/jdk/make/lib/Awt2dLibraries.gmk	Tue Jun 09 11:52:12 2015 -0700
+++ b/jdk/make/lib/Awt2dLibraries.gmk	Tue Jun 16 14:38:12 2015 -0700
@@ -391,6 +391,8 @@
     -I$(JDK_TOPDIR)/src/java.desktop/share/native/common/awt/debug \
     $(LIBJAVA_HEADER_FLAGS) \
     #
+# The fast floor code loses precision.
+LCMS_CFLAGS=-DCMS_DONT_USE_FAST_FLOOR
 
 ifeq ($(USE_EXTERNAL_LCMS), true)
   # If we're using an external library, we'll just need the wrapper part.