diff --git a/.gitmodules b/.gitmodules
index 6494149..ee6967d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "modules/prompt/functions/pure"]
 	path = modules/prompt/external/pure
 	url = https://github.com/sindresorhus/pure.git
+[submodule "modules/fasd/external"]
+	path = modules/fasd/external
+	url = https://github.com/clvv/fasd
diff --git a/modules/fasd/external b/modules/fasd/external
new file mode 160000
index 0000000..90b531a
--- /dev/null
+++ b/modules/fasd/external
@@ -0,0 +1 @@
+Subproject commit 90b531a5daaa545c74c7d98974b54cbdb92659fc
diff --git a/modules/fasd/init.zsh b/modules/fasd/init.zsh
index fc21425..9a68d0d 100644
--- a/modules/fasd/init.zsh
+++ b/modules/fasd/init.zsh
@@ -9,10 +9,8 @@
 # Load dependencies.
 pmodload 'editor'
 
-# Return if requirements are not found.
-if (( ! $+commands[fasd] )); then
-  return 1
-fi
+# Source module file.
+source "${0:h}/external/fasd" || return 1
 
 #
 # Initialization