diff --git a/Makefile.am b/Makefile.am
index 046cccf0ffd75ef09e1bf60dcddd7f0b73081dbf..52ddf0f52171db47e52740151dbfcdb4587cb5ec 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,7 +8,7 @@ lib_LIBRARIES = libnettle.a
 libnettleinclude_HEADERS = aes.h arcfour.h blowfish.h cast128.h des.h des-compat.h \
 			   serpent.h twofish.h \
 			   md5.h md5-compat.h sha.h \
-			   cbc.h
+			   cbc.h yarrow.h
 
 libnettle_a_SOURCES = aes.c aes.h arcfour.c arcfour.h \
 		      cast128.c cast128.h cast128_sboxes.h \
@@ -19,7 +19,7 @@ libnettle_a_SOURCES = aes.c aes.h arcfour.c arcfour.h \
 		      md5.c md5.h md5-compat.c md5-compat.h \
 		      sha.h sha1.c sha256.c \
 		      serpent.c serpent.h serpent_sboxes.h \
-		      twofish.c twofish.h
+		      twofish.c twofish.h yarrow256.c yarrow.h
 
 libnettle_a_LIBADD = @LIBOBJS@