diff --git a/antigen.zsh b/antigen.zsh
index f4e78653..eaf64c45 100644
--- a/antigen.zsh
+++ b/antigen.zsh
@@ -1,2 +1,3 @@
 _ANTIGEN_INSTALL_DIR=${0:A:h}
+_ANTIGEN_INSTALL_FILENAME=${0:A}
 source $_ANTIGEN_INSTALL_DIR/bin/antigen.zsh
diff --git a/bin/antigen.zsh b/bin/antigen.zsh
index aeba2a7a..43e51492 100644
--- a/bin/antigen.zsh
+++ b/bin/antigen.zsh
@@ -47,6 +47,7 @@ if [[ $ANTIGEN_CACHE != false ]]; then
   fi
 fi
 [[ -z "$_ANTIGEN_INSTALL_DIR" ]] && _ANTIGEN_INSTALL_DIR=${0:A:h}
+[[ -z "$_ANTIGEN_INSTALL_FILENAME" ]] && _ANTIGEN_INSTALL_FILENAME=${0:A}
 
 # Each line in this string has the following entries separated by a space
 # character.
@@ -1830,7 +1831,7 @@ cat > $ANTIGEN_CACHE <<EOC
 $(functions -- _antigen)
 antigen () {
   local MATCH MBEGIN MEND
-  [[ "\$ZSH_EVAL_CONTEXT" =~ "toplevel:*" || "\$ZSH_EVAL_CONTEXT" =~ "cmdarg:*" ]] && source "$_ANTIGEN_INSTALL_DIR/antigen.zsh" && eval antigen \$@;
+  [[ "\$ZSH_EVAL_CONTEXT" =~ "toplevel:*" || "\$ZSH_EVAL_CONTEXT" =~ "cmdarg:*" ]] && source "$_ANTIGEN_INSTALL_FILENAME" && eval antigen \$@;
   return 0;
 }
 typeset -gaU fpath path
diff --git a/src/antigen.zsh b/src/antigen.zsh
index dbeebb1b..b6effbdf 100644
--- a/src/antigen.zsh
+++ b/src/antigen.zsh
@@ -1,4 +1,5 @@
 [[ -z "$_ANTIGEN_INSTALL_DIR" ]] && _ANTIGEN_INSTALL_DIR=${0:A:h}
+[[ -z "$_ANTIGEN_INSTALL_FILENAME" ]] && _ANTIGEN_INSTALL_FILENAME=${0:A}
 
 # Each line in this string has the following entries separated by a space
 # character.
diff --git a/src/ext/cache.zsh b/src/ext/cache.zsh
index 248638d6..90240196 100644
--- a/src/ext/cache.zsh
+++ b/src/ext/cache.zsh
@@ -46,7 +46,7 @@ cat > $ANTIGEN_CACHE <<EOC
 $(functions -- _antigen)
 antigen () {
   local MATCH MBEGIN MEND
-  [[ "\$ZSH_EVAL_CONTEXT" =~ "toplevel:*" || "\$ZSH_EVAL_CONTEXT" =~ "cmdarg:*" ]] && source "$_ANTIGEN_INSTALL_DIR/antigen.zsh" && eval antigen \$@;
+  [[ "\$ZSH_EVAL_CONTEXT" =~ "toplevel:*" || "\$ZSH_EVAL_CONTEXT" =~ "cmdarg:*" ]] && source "$_ANTIGEN_INSTALL_FILENAME" && eval antigen \$@;
   return 0;
 }
 typeset -gaU fpath path