diff --git a/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.pro b/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.pro
index ce0a4bc7aa7..aa942fc5faa 100644
--- a/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.pro
+++ b/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.pro
@@ -9,6 +9,5 @@ include(../../../qtcreator.pri)
 include(../../libs/cplusplus/cplusplus-lib.pri)
 include(../../../src/tools/cplusplus-tools-utils/cplusplus-tools-utils.pri)
 
-DEFINES *= QT_NO_CAST_FROM_ASCII
 DEFINES += PATH_AST_H=\\\"$$PWD/../../libs/3rdparty/cplusplus/AST.h\\\"
 SOURCES += cplusplus-mkvisitor.cpp
diff --git a/src/tools/cplusplus-update-frontend/cplusplus-update-frontend.pro b/src/tools/cplusplus-update-frontend/cplusplus-update-frontend.pro
index 364e9490ebc..8e1cc49ba41 100644
--- a/src/tools/cplusplus-update-frontend/cplusplus-update-frontend.pro
+++ b/src/tools/cplusplus-update-frontend/cplusplus-update-frontend.pro
@@ -9,7 +9,6 @@ DEFINES += QTCREATOR_UTILS_STATIC_LIB
 include(../../../qtcreator.pri)
 include(../../libs/cplusplus/cplusplus-lib.pri)
 
-DEFINES *= QT_NO_CAST_FROM_ASCII
 DEFINES += PATH_CPP_FRONTEND=\\\"$$PWD/../../libs/3rdparty/cplusplus\\\"
 DEFINES += PATH_DUMPERS_FILE=\\\"$$PWD/../../../tests/tools/cplusplus-ast2png/dumpers.inc\\\"
 SOURCES += cplusplus-update-frontend.cpp ../../libs/utils/changeset.cpp
diff --git a/tests/tools/cplusplus-ast2png/cplusplus-ast2png.pro b/tests/tools/cplusplus-ast2png/cplusplus-ast2png.pro
index c02c4dba9fb..8a0fd726ad5 100644
--- a/tests/tools/cplusplus-ast2png/cplusplus-ast2png.pro
+++ b/tests/tools/cplusplus-ast2png/cplusplus-ast2png.pro
@@ -9,5 +9,4 @@ include(../../../qtcreator.pri)
 include(../../../src/libs/cplusplus/cplusplus-lib.pri)
 include(../../../src/tools/cplusplus-tools-utils/cplusplus-tools-utils.pri)
 
-DEFINES *= QT_NO_CAST_FROM_ASCII
 SOURCES += cplusplus-ast2png.cpp