diff --git a/init/bash.in b/init/bash.in
index 2c82ea8bb..bede85e79 100644
--- a/init/bash.in
+++ b/init/bash.in
@@ -25,7 +25,7 @@ fi
 
 __build_FPATH_for_zsh_ksh()
 {
-  zsh_fpath=$(zsh -f -c 'echo $FPATH')
+  zsh_fpath=$(unset FPATH; zsh -f -c 'echo $FPATH')
   export FPATH=$(@PKGV@/libexec/addto --append FPATH $zsh_fpath @PKGV@/init/ksh_funcs)
   unset zsh_fpath
 }