diff --git a/fish_prompt.fish b/fish_prompt.fish
index 42071d1..0a6a3f3 100644
--- a/fish_prompt.fish
+++ b/fish_prompt.fish
@@ -777,9 +777,11 @@ function __bobthefish_prompt_rubies -S -d 'Display current Ruby information'
     else if type -q chruby # chruby is implemented as a function, so omitting the -f is intentional
         set ruby_version $RUBY_VERSION
     else if type -fq asdf
-        asdf current ruby 2>/dev/null | read -l asdf_ruby_version asdf_provenance
+        set -l asdf_current_ruby (asdf current ruby 2>/dev/null)
         or return
 
+        echo "$asdf_current_ruby" | read -l asdf_ruby_version asdf_provenance
+
         # If asdf changes their ruby version provenance format, update this to match
         [ (string trim -- "$asdf_provenance") = "(set by $HOME/.tool-versions)" ]
         and return