diff --git a/tests/benchmarks/printfbench.cpp b/tests/benchmarks/printfbench.cpp
index 49f5d8e433..4fa8c3dbee 100644
--- a/tests/benchmarks/printfbench.cpp
+++ b/tests/benchmarks/printfbench.cpp
@@ -17,7 +17,16 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#include <wx/string.h>
+#include "testprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include <wx/string.h>
+#endif // WX_PRECOMP
+
 #include <wx/stopwatch.h>
 #include <wx/utils.h>
 #include <wx/cmdline.h>