diff --git a/aegisub/src/command/edit.cpp b/aegisub/src/command/edit.cpp
index 8bbe7e0de..fe1b5d8b4 100644
--- a/aegisub/src/command/edit.cpp
+++ b/aegisub/src/command/edit.cpp
@@ -863,8 +863,8 @@ std::string trim_text(std::string text) {
 	boost::regex start("^( |\t|\\\\[nNh])+");
 	boost::regex end("( |\t|\\\\[nNh])+$");
 
-	regex_replace(text, start, "", boost::format_first_only);
-	regex_replace(text, end, "", boost::format_first_only);
+	text = regex_replace(text, start, "", boost::format_first_only);
+	text = regex_replace(text, end, "", boost::format_first_only);
 	return text;
 }