diff --git a/library/blowfish.c b/library/blowfish.c
index 910d610..733c9fa 100644
--- a/library/blowfish.c
+++ b/library/blowfish.c
@@ -29,7 +29,11 @@
  *
  */
 
+#if !defined(POLARSSL_CONFIG_FILE)
 #include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
 
 #if defined(POLARSSL_BLOWFISH_C)