diff --git a/configure b/configure
index e303eda..f437803 100755
--- a/configure
+++ b/configure
@@ -13095,6 +13095,20 @@ fi
 done
 
 
+# Check for getline support, used as a part of authenticated
+# connections.
+for ac_func in getline
+do :
+  ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
+if test "x$ac_cv_func_getline" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_GETLINE 1
+_ACEOF
+
+fi
+done
+
+
 # Check for packet pacing socket option (Linux only for now).
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking SO_MAX_PACING_RATE socket option" >&5
 $as_echo_n "checking SO_MAX_PACING_RATE socket option... " >&6; }
diff --git a/src/iperf_config.h.in b/src/iperf_config.h.in
index a9e51ec..20ddd26 100644
--- a/src/iperf_config.h.in
+++ b/src/iperf_config.h.in
@@ -15,6 +15,9 @@
 /* Have IPv6 flowlabel support. */
 #undef HAVE_FLOWLABEL
 
+/* Define to 1 if you have the `getline' function. */
+#undef HAVE_GETLINE
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H