diff --git a/ChangeLog b/ChangeLog
index 969ac28..a5f866f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -154,7 +154,7 @@
      to find the Qt 3.x moc instead of the correct one. Use the --with-qt4-moc option
      to force the right moc compiler path.
      In Qt 4.x mode the COMPILE_USE_QT4 preprocessor variable is set: use it for conditionals...
-     an #ifdef COMPILE_USE_QT4 is more or less equivalent to #if QT_VERSION >= 0x040000.
+     an #ifdef COMPILE_USE_QT4 is more or less equivalent to #if TQT_VERSION >= 0x040000.
      We will need to "abstract" several collection classes to make everything
      work with both Qt 3.x and Qt 4.x. The goal is (or better would be) to hide everything in
      kvilib in order to have almost no conditional compilation in the kvirc core and in the modules.
diff --git a/acinclude.m4 b/acinclude.m4
index 87714a8..345906f 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2049,7 +2049,7 @@ AC_DEFUN([AC_SS_ENSURE_CAN_COMPILE_X_AND_QT4],
 		LDFLAGS="-s $LDFLAGS"
 		AC_TRY_LINK([
 			#include <qglobal.h>
-			#if (QT_VERSION < 0x040000)
+			#if (TQT_VERSION < 0x040000)
 				#error "Bad qt version: too old"
 			#endif
 			],[return 0; ],SS_QTX_LINKED_OK="TRUE",SS_QTX_LINKED_OK="FALSE")
diff --git a/admin/acinclude.m4.in b/admin/acinclude.m4.in
index 375b5e8..f93e354 100644
--- a/admin/acinclude.m4.in
+++ b/admin/acinclude.m4.in
@@ -2076,7 +2076,7 @@ AC_DEFUN([AC_SS_ENSURE_CAN_COMPILE_X_AND_QT4],
 		LDFLAGS="-s $LDFLAGS"
 		AC_TRY_LINK([
 			#include <qglobal.h>
-			#if (QT_VERSION < 0x040000)
+			#if (TQT_VERSION < 0x040000)
 				#error "Bad qt version: too old"
 			#endif
 			],[return 0; ],SS_QTX_LINKED_OK="TRUE",SS_QTX_LINKED_OK="FALSE")
diff --git a/doc/hackers.guide.txt b/doc/hackers.guide.txt
index 5eddcc8..9143be1 100644
--- a/doc/hackers.guide.txt
+++ b/doc/hackers.guide.txt
@@ -886,7 +886,7 @@ For the moment, in random order:
     #ifdef COMPILE_USE_QT4
   to check if the compilation requires Qt 4.x or Qt 3.x.
   Later this *might* be automatically replaced with
-    #if QT_VERSION >= 0x040000
+    #if TQT_VERSION >= 0x040000
 
 - Use:
     ./configure --enable-debug --enable-qt4 --with-qt4-moc=/path/moc