diff --git a/include/iodbc.h b/include/iodbc.h
index 5d9fc12c..11ad2c2e 100644
--- a/include/iodbc.h
+++ b/include/iodbc.h
@@ -98,9 +98,15 @@
 #if	!defined(WINDOWS) && !defined(WIN32_SYSTEM)
 #define _UNIX_
 
+#ifndef _POSIX_C_SOURCE
+/* POSIX.1-2008 is required for strdup() */
+#define _POSIX_C_SOURCE 200809L
+#endif
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <strings.h>
 #include <sys/types.h>
 
 #define MEM_ALLOC(size)	(malloc((size_t)(size)))
diff --git a/iodbc/connect.c b/iodbc/connect.c
index 641c2377..75aeaedd 100644
--- a/iodbc/connect.c
+++ b/iodbc/connect.c
@@ -83,6 +83,7 @@
 #include <sqlucode.h>
 #include <iodbcext.h>
 #include <odbcinst.h>
+#include <time.h>
 
 #include "dlproc.h"