diff --git a/INSTALL b/INSTALL
index 6b0e501..3e39ee1 100644
--- a/INSTALL
+++ b/INSTALL
@@ -115,7 +115,7 @@ Dealing with Configuration Problems
 -----------------------------------
 
 To locate Qt, CMake searches for qmake in your execute path
-($PATH). CMake does not use the QTDIR environment variable. So make
+($PATH). CMake does not use the TQTDIR environment variable. So make
 sure that the first qmake found in the execution path is the one you
 like to use.
 
diff --git a/cmake_admin/FindPCHSupport.cmake b/cmake_admin/FindPCHSupport.cmake
index d31a00d..bea00dc 100644
--- a/cmake_admin/FindPCHSupport.cmake
+++ b/cmake_admin/FindPCHSupport.cmake
@@ -60,7 +60,7 @@ MACRO(ADD_PRECOMPILED_HEADER _targetName _input)
         OUTPUT ${_output}
         COMMAND ${CMAKE_CXX_COMPILER}
            ${_compiler_FLAGS}
-           -I${QT_INCLUDE_DIR}
+           -I${TQT_INCLUDE_DIR}
            -I${KDE3_INCLUDE_DIR}
            ${QT_DEFINITIONS}
            ${KDE3_DEFINITIONS}