diff --git a/src/libstrongswan/plugins/blowfish/blowfish_crypter.c b/src/libstrongswan/plugins/blowfish/blowfish_crypter.c
index cd7c36c28..e64f6f23d 100644
--- a/src/libstrongswan/plugins/blowfish/blowfish_crypter.c
+++ b/src/libstrongswan/plugins/blowfish/blowfish_crypter.c
@@ -64,7 +64,7 @@
  
 #include "blowfish_crypter.h"
 
-#define BLOWFISH_BLOCK_SIZE		16
+#define BLOWFISH_BLOCK_SIZE		8
 
 typedef struct private_blowfish_crypter_t private_blowfish_crypter_t;