diff --git a/acinclude.m4.in b/acinclude.m4.in
index 73434e5..6a34780 100644
--- a/acinclude.m4.in
+++ b/acinclude.m4.in
@@ -3369,9 +3369,9 @@ if $PKG_CONFIG --exists tqt-mt ; then
           AC_TRY_COMPILE(
           [
 #include <tqglobal.h>
-#if Q_EXPORT - 0 != 0
-/* if this compiles, then Q_EXPORT is undefined */
-/* if Q_EXPORT is nonempty, this will break compilation */
+#if TQ_EXPORT - 0 != 0
+/* if this compiles, then TQ_EXPORT is undefined */
+/* if TQ_EXPORT is nonempty, this will break compilation */
 #endif
           ], [/* Elvis is not dead, he just went home! (Men In Black, 1997) */],
           kde_cv_val_tqt_gcc_visibility_patched=no, kde_cv_val_tqt_gcc_visibility_patched=yes)