diff --git a/src/core/dbus-execute.c b/src/core/dbus-execute.c
index 642ca6eeabb..39823c8675a 100644
--- a/src/core/dbus-execute.c
+++ b/src/core/dbus-execute.c
@@ -1842,11 +1842,11 @@ int bus_exec_context_set_transient_property(
 
                                 if (streq(name, "StandardErrorFile")) {
                                         c->std_error = EXEC_OUTPUT_FILE;
-                                        unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "StandardOutput=file:%s", s);
+                                        unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "StandardError=file:%s", s);
                                 } else {
                                         assert(streq(name, "StandardErrorFileToAppend"));
                                         c->std_error = EXEC_OUTPUT_FILE_APPEND;
-                                        unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "StandardOutput=append:%s", s);
+                                        unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "StandardError=append:%s", s);
                                 }
                         }
                 }