diff --git a/lib/cpp/configure.ac b/lib/cpp/configure.ac
index 0499a0e..a269df6 100644
--- a/lib/cpp/configure.ac
+++ b/lib/cpp/configure.ac
@@ -28,12 +28,12 @@
 
 AC_CHECK_HEADERS([sys/socket.h])
 
-AC_CHECK_HEADERS([bits/socket.h])
-
 AC_CHECK_HEADERS([sys/time.h])
 
 AC_CHECK_HEADERS([unistd.h])
 
+AC_CHECK_LIB(pthread, pthread_create)
+
 AC_C_CONST
 
 AC_C_VOLATILE
@@ -47,7 +47,7 @@
 AC_TYPE_SIZE_T
 
 AC_TYPE_INT32_T
-x
+
 AC_TYPE_INT64_T
 
 AC_TYPE_UINT16_T