diff --git a/src/tl/unit_tests/tlDeferredExecutionTests.cc b/src/tl/unit_tests/tlDeferredExecutionTests.cc
index f87aa7a02..b3b5bce0f 100644
--- a/src/tl/unit_tests/tlDeferredExecutionTests.cc
+++ b/src/tl/unit_tests/tlDeferredExecutionTests.cc
@@ -23,7 +23,9 @@
 #include "tlDeferredExecution.h"
 #include "tlUnitTest.h"
 
-#include <QCoreApplication>
+#if defined(HAVE_QT)
+#  include <QCoreApplication>
+#endif
 
 int g_na = 0;
 int g_nb = 0;