diff --git a/src/App/ApplicationPy.cpp b/src/App/ApplicationPy.cpp
index e9f8e27e4b..361c5aeff6 100644
--- a/src/App/ApplicationPy.cpp
+++ b/src/App/ApplicationPy.cpp
@@ -317,7 +317,7 @@ PyObject* Application::sCloseDocument(PyObject * /*self*/, PyObject *args)
         return nullptr;
     }
 
-    if (GetApplication().closeDocument(pstr) == false) {
+    if (!GetApplication().closeDocument(pstr)) {
         PyErr_Format(PyExc_RuntimeError, "Closing the document '%s' failed", pstr);
         return nullptr;
     }
@@ -333,7 +333,7 @@ PyObject* Application::sSaveDocument(PyObject * /*self*/, PyObject *args)
 
     Document* doc = GetApplication().getDocument(pDoc);
     if ( doc ) {
-        if ( doc->save() == false ) {
+        if (!doc->save()) {
             PyErr_Format(Base::PyExc_FC_GeneralError, "Cannot save document '%s'", pDoc);
             return nullptr;
         }
diff --git a/src/App/Document.cpp b/src/App/Document.cpp
index a0b1fc0f37..00fee2e0d4 100644
--- a/src/App/Document.cpp
+++ b/src/App/Document.cpp
@@ -2402,7 +2402,7 @@ private:
                     fn = str.str();
                 }
 
-                if (fi.renameFile(fn.c_str()) == false)
+                if (!fi.renameFile(fn.c_str()))
                     Base::Console().Warning("Cannot rename project file to backup file\n");
             }
             else {
@@ -2411,7 +2411,7 @@ private:
         }
 
         Base::FileInfo tmp(sourcename);
-        if (tmp.renameFile(targetname.c_str()) == false) {
+        if (!tmp.renameFile(targetname.c_str())) {
             throw Base::FileException(
                 "Cannot rename tmp save file to project file", targetname);
         }
@@ -2511,7 +2511,7 @@ private:
                             }
                         }
                         else {
-                            if (renameFileNoErase(fi, fn+".FCBak") == false) {
+                            if (!renameFileNoErase(fi, fn+".FCBak")) {
                                 fn = fn + "-";
                             }
                             else {
@@ -2555,7 +2555,7 @@ private:
         }
 
         Base::FileInfo tmp(sourcename);
-        if (tmp.renameFile(targetname.c_str()) == false) {
+        if (!tmp.renameFile(targetname.c_str())) {
             throw Base::FileException(
                 "Save interrupted: Cannot rename temporary file to project file", tmp);
         }
diff --git a/src/App/Metadata.cpp b/src/App/Metadata.cpp
index 96aa4b8236..029bcffc87 100644
--- a/src/App/Metadata.cpp
+++ b/src/App/Metadata.cpp
@@ -458,7 +458,7 @@ bool Metadata::satisfies(const Meta::Dependency& dep)
         }
         auto parsedExpression = App::Expression::parse(nullptr, dep.condition);
         auto result = parsedExpression->eval();
-        if (boost::any_cast<bool> (result->getValueAsAny()) == false)
+        if (!boost::any_cast<bool> (result->getValueAsAny()))
             return false;
     }