diff --git a/Makefile.am b/Makefile.am
index 5b10a90a..8bd80e02 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -36,7 +36,8 @@ ell_sources = ell/ell.h ell/private.h ell/missing.h \
 			ell/siphash.c \
 			ell/hwdb.h ell/hwdb.c \
 			ell/cipher.h ell/cipher.c \
-			ell/random.h ell/random.c
+			ell/random.h ell/random.c \
+			ell/uintset.h ell/uintset.c
 
 ell_libell_internal_la_SOURCES = $(ell_sources)