diff --git a/mail/hashcash/files/patch-sha1.h b/mail/hashcash/files/patch-sha1.h
new file mode 100644
index 000000000000..f700ecf72d35
--- /dev/null
+++ b/mail/hashcash/files/patch-sha1.h
@@ -0,0 +1,25 @@
+--- sha1.h.orig
++++ sha1.h
+@@ -36,8 +36,6 @@
+         (ctx)->num = 0l				\
+     } while (0)
+ 
+-#define SHA1_Transform( iv, data ) SHA1_Xform( iv, data )
+-
+ #else
+ 
+ typedef struct {
+@@ -60,9 +58,12 @@
+ 
+ #endif
+ 
+-void SHA1_Xform( word32[ SHA1_DIGEST_WORDS ], 
++void SHA1_Xform( word32[ SHA1_DIGEST_WORDS ],
+ 		 const byte[ SHA1_INPUT_BYTES ] );
+ 
++void SHA1_Transform( word32[ SHA1_DIGEST_WORDS ],
++		     const byte[ SHA1_INPUT_BYTES ] );
++
+ #if defined( __cplusplus )
+ }
+ #endif