diff --git a/src/libs/qmuparser/qmuparsercallback.cpp b/src/libs/qmuparser/qmuparsercallback.cpp
index 7b642c982..b8f1ab40f 100644
--- a/src/libs/qmuparser/qmuparsercallback.cpp
+++ b/src/libs/qmuparser/qmuparsercallback.cpp
@@ -337,7 +337,7 @@ __extension__
     m_eOprtAsct(oaNONE),
     m_iCode(cmUNKNOWN),
     m_iType(tpVOID),
-    m_bAllowOpti(0)
+    m_bAllowOpti(false)
 {
 }
 
diff --git a/src/libs/qmuparser/qmuparsertest.cpp b/src/libs/qmuparser/qmuparsertest.cpp
index 0d7aae00d..706b8f3bd 100644
--- a/src/libs/qmuparser/qmuparsertest.cpp
+++ b/src/libs/qmuparser/qmuparsertest.cpp
@@ -1200,7 +1200,7 @@ auto QmuParserTester::ThrowTest(const QString &a_str, int a_iErrc, bool a_bFail)
     }
 
     // if a_bFail==false no exception is expected
-    bool const bRet((a_bFail == false) ? 0 : 1);
+    bool const bRet((a_bFail == false) ? false : true);
     if (bRet == 1)
     {
         qWarning() << "\n  "
diff --git a/src/libs/vdxf/libdxfrw/libdxfrw.cpp b/src/libs/vdxf/libdxfrw/libdxfrw.cpp
index 20eb7ff2d..5d6799146 100644
--- a/src/libs/vdxf/libdxfrw/libdxfrw.cpp
+++ b/src/libs/vdxf/libdxfrw/libdxfrw.cpp
@@ -533,7 +533,7 @@ auto dxfRW::writeVport(DRW_Vport *ent) -> bool
             writer->writeString(348, "10020");
             writer->writeInt16(60, ent->gridBehavior); // v2007 undocummented see DRW_Vport class
             writer->writeInt16(61, 5);
-            writer->writeBool(292, 1);
+            writer->writeBool(292, true);
             writer->writeInt16(282, 1);
             writer->writeDouble(141, 0.0);
             writer->writeDouble(142, 0.0);