diff --git a/hecl/extern/blowfish/CMakeLists.txt b/hecl/extern/blowfish/CMakeLists.txt
new file mode 100644
index 000000000..364f1ab04
--- /dev/null
+++ b/hecl/extern/blowfish/CMakeLists.txt
@@ -0,0 +1 @@
+add_library(blowfish blowfish.c blowfish.dat.c blowfish.h)