diff --git a/pngtest.c b/pngtest.c
index 81da72126..ba2b7463e 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -45,6 +45,11 @@
 
 #include "png.h"
 
+/* This hack was introduced for historical reasons, and we are
+ * still keeping it in libpng-1.6.x for compatibility reasons.
+ */
+#define STDERR stdout
+
 /* Generate a compiler error if there is an old png.h in the search path. */
 typedef png_libpng_version_1_6_44_git Your_png_h_is_not_version_1_6_44_git;
 
@@ -103,11 +108,6 @@ typedef png_libpng_version_1_6_44_git Your_png_h_is_not_version_1_6_44_git;
 typedef FILE * png_FILE_p;
 #endif
 
-/* This hack was introduced for historical reasons, and we are
- * still keeping it in libpng-1.6.x for compatibility reasons.
- */
-#define STDERR stdout
-
 #ifndef PNG_DEBUG
 #  define PNG_DEBUG 0
 #endif