diff --git a/modules/imgui/src/guispacetimecomponent.cpp b/modules/imgui/src/guispacetimecomponent.cpp
index eee574e502..4f66a848ef 100644
--- a/modules/imgui/src/guispacetimecomponent.cpp
+++ b/modules/imgui/src/guispacetimecomponent.cpp
@@ -348,7 +348,7 @@ void GuiSpaceTimeComponent::render() {
                 openspace::TimeUnits.end(),
                 std::string(""),
                 [](const std::string& a, const openspace::TimeUnit& unit) {
-                    return fmt::format("{}{} / second\0", a, nameForTimeUnit(unit, true));
+                    return fmt::format("{}{} / second", a, nameForTimeUnit(unit, true)) + '\0';
                 }
             );