1 files changed, 5 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 92ca41e4..e3b1b454 100644
--- a/configure.ac
+++ b/configure.ac
@@ -109,7 +109,11 @@ AC_SUBST(CURL_CFLAGS)
 AC_SUBST(CURL_LIBS) 
 
 case "$(uname -s)" in
-  Linux | FreeBSD)
+  Linux)
+    LIBS="$LIBS -lcrypt"
+    CPPFLAGS="-D_XOPEN_SOURCE $CPPFLAGS"
+    ;;
+  FreeBSD)
     LIBS="$LIBS -lcrypt"
     ;;
   OpenBSD)