--- a/src/mk/FreeBSD
+++ b/src/mk/FreeBSD
@@ -1,5 +1,7 @@
 CXXFLAGS = -pthread -Wall -g -I. -I../index -I../utils -I../common \
-	 -I../unac -I../bincimapmime -I/usr/local/include 
+	 -I../unac -I../bincimapmime -I/usr/local/include  \
+	 \
+	 -DHAVE_VASPRINTF=1
 
 LIBXAPIAN = -L/usr/local/lib -lxapian
 LIBICONV =  -L/usr/local/lib -liconv