diff --git a/lib/prompt-init b/lib/prompt-init
index e878e74..8c939f4 100755
--- a/lib/prompt-init
+++ b/lib/prompt-init
@@ -8,11 +8,14 @@ if [[ -a "$OVER_PROMPT_CFG" ]]; then
 	source "$OVER_PROMPT_CFG"
 fi
 
-function __over_prompt_set_title {
-	if [[ ${TERM} =~ "screen" ]]; then
-		print -Pn "\033k\033${@}\033\134"
-	fi
-}
+# emits garbage on tmux, where it's not really needed anyway
+if [[ ! -n "$TMUX" ]]; then
+	function __over_prompt_set_title {
+		if [[ ${TERM} =~ "screen" ]]; then
+			print -Pn "\033k\033${@}\033\134"
+		fi
+	}
+fi
 
 function __over_prompt_preexec {
 	__over_prompt_set_title "${USER}: ${PWD} -> ${1}"