diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84ef3c5..04e1ac6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -393,6 +393,7 @@ set( tqt_INCS
   qtinterface/tqwmatrix.h
   qtinterface/tqxml.h
   qtinterface/private/tqucomextra_p.h
+  qtinterface/private/tqlayoutengine_p.h
   qtinterface/tqlistiterator.h
 )
 
diff --git a/qtinterface/Makefile.am b/qtinterface/Makefile.am
index 14bc973..d02db73 100644
--- a/qtinterface/Makefile.am
+++ b/qtinterface/Makefile.am
@@ -130,6 +130,7 @@ tqwaitcondition.h tqwhatsthis.h tqwidgetfactory.h tqwidgetintdict.h tqwidgetlist
 tqxml.h \
 \
 private/tqucomextra_p.h \
+private/tqlayoutengine_p.h \
 \
 tqlistiterator.h
 noinst_HEADERS =
@@ -164,4 +165,4 @@ install-exec-local:
 	sed -i '$(QT_VER_REPLACE)' "$(DESTDIR)$(bindir)/tqt-replace"
 	sed -i '$(QT_VER_REPLACE)' "$(DESTDIR)$(bindir)/tqt-replace-stream"
 	sed -i '$(QT_HVER_REPLACE)' "$(srcdir)/tqt.h"
-	cp -Rp "$(srcdir)/tqt4/" "$(DESTDIR)$(includedir)/"
\ No newline at end of file
+	cp -Rp "$(srcdir)/tqt4/" "$(DESTDIR)$(includedir)/"