diff --git a/fish/files/config.fish b/fish/files/config.fish
index e42b28d..e6b2dc7 100644
--- a/fish/files/config.fish
+++ b/fish/files/config.fish
@@ -2,6 +2,9 @@
 set -q __fish_home_manager_config_sourced; and exit
 set -g __fish_home_manager_config_sourced 1
 
+# Ensure UTF-8 locale (needed for Nerd Font symbols in tmux)
+set -gx LANG en_US.UTF-8
+set -gx LC_ALL en_US.UTF-8
 
 # Add ROCm bin directory to PATH
 set -gx PATH "/opt/rocm/bin" $PATH