diff --git a/library/md2.c b/library/md2.c
index 4daea58..de64d70 100644
--- a/library/md2.c
+++ b/library/md2.c
@@ -35,7 +35,9 @@
 
 #include "polarssl/md2.h"
 
+#if defined(POLARSSL_FS_IO) || defined(POLARSSL_SELF_TEST)
 #include <stdio.h>
+#endif
 
 static const unsigned char PI_SUBST[256] =
 {
@@ -175,6 +177,7 @@
     memset( &ctx, 0, sizeof( md2_context ) );
 }
 
+#if defined(POLARSSL_FS_IO)
 /*
  * output = MD2( file contents )
  */
@@ -206,6 +209,7 @@
     fclose( f );
     return( 0 );
 }
+#endif /* POLARSSL_FS_IO */
 
 /*
  * MD2 HMAC context setup