diff --git a/configure.ac b/configure.ac
index db4e4a421..ad3b9805c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -449,6 +449,8 @@ AC_LINK_IFELSE(
 )
 AC_CHECK_FUNCS([pthread_yield pthread_setname_np])
 
+AC_CHECK_DECLS([optreset], [], [], [[#include <unistd.h>]])
+
 AC_ARG_ENABLE(docs,
   AS_HELP_STRING([--enable-docs],[enable generation of documentation]),
   [ENABLE_DOCS=${enableval}], [ENABLE_DOCS=no])
diff --git a/src/librtpp_main.c b/src/librtpp_main.c
index 8cf096272..1ae306d2e 100644
--- a/src/librtpp_main.c
+++ b/src/librtpp_main.c
@@ -27,6 +27,8 @@
 
 #include <unistd.h>
 
+#include "config.h"
+
 #include "librtpproxy.h"
 #include "librtpp_main.h"
 
@@ -38,8 +40,8 @@ struct opt_save {
     int optreset;
 };
 
-#if defined(__linux__)
-static int optreset; /* Not present in linux */
+#if !HAVE_DECL_OPTRESET
+static int optreset; /* Not present in glibc */
 #endif
 
 #define OPT_SAVE(sp) (*(sp) = (struct opt_save){optarg, optind, optopt, opterr, optreset})