--- a/make/common/JavaCompilation.gmk	Thu Mar 12 12:30:36 2015 -0700
+++ b/make/common/JavaCompilation.gmk	Thu Mar 12 19:51:35 2015 -0700
@@ -369,7 +369,7 @@
 	$(MKDIR) -p $$(@D)
 	export LC_ALL=C ; ( $(CAT) $$< && $(ECHO) "" ) \
 	    | $(SED) -e 's/\([^\\]\):/\1\\:/g' -e 's/\([^\\]\)=/\1\\=/g' \
-	        -e 's/\([^\\]\)!/\1\\!/g' -e 's/#.*/#/g' \
+	        -e 's/\([^\\]\)!/\1\\!/g' -e 's/^[ 	]*#.*/#/g' \
 	    | $(SED) -f "$(SRC_ROOT)/make/common/support/unicode2x.sed" \
 	    | $(SED) -e '/^#/d' -e '/^$$$$/d' \
 	        -e :a -e '/\\$$$$/N; s/\\\n//; ta' \