diff --git a/platform/x11/os_x11.cpp b/platform/x11/os_x11.cpp
index c695d657e73..54d3759cc52 100644
--- a/platform/x11/os_x11.cpp
+++ b/platform/x11/os_x11.cpp
@@ -1866,6 +1866,7 @@ void OS_X11::handle_key_event(XKeyEvent *p_event, bool p_echo) {
 
 				input->accumulate_input_event(k);
 			}
+			memfree(utf8string);
 			return;
 		}
 		memfree(utf8string);