diff --git a/dev-db/postgresql/postgresql-9.3.5.recipe b/dev-db/postgresql/postgresql-9.3.5.recipe
index 7ea4f0cc1..7fb79da1d 100644
--- a/dev-db/postgresql/postgresql-9.3.5.recipe
+++ b/dev-db/postgresql/postgresql-9.3.5.recipe
@@ -93,7 +93,7 @@ BUILD_PREREQUIRES="
 
 BUILD()
 {
-	runConfigure ./configure
+	CFLAGS=-D_BSD_SOURCE runConfigure ./configure
 	make $jobArgs
 }