diff --git a/taglib/ape/apetag.cpp b/taglib/ape/apetag.cpp
index 4d75c7aa..9c359aad 100644
--- a/taglib/ape/apetag.cpp
+++ b/taglib/ape/apetag.cpp
@@ -255,7 +255,7 @@ PropertyMap APE::Tag::setProperties(const PropertyMap &origProps)
   for(const auto &[tagName, val] : std::as_const(props)) {
     if(!checkKey(tagName))
       invalid.insert(tagName, val);
-    else if(!(itemListMap().contains(tagName)) || !(itemListMap()[tagName].values() == val)) {
+    else if(!itemListMap().contains(tagName) || itemListMap()[tagName].values() != val) {
       if(val.isEmpty())
         removeItem(tagName);
       else {
diff --git a/taglib/mpeg/id3v2/id3v2framefactory.cpp b/taglib/mpeg/id3v2/id3v2framefactory.cpp
index d96ccc0f..073704be 100644
--- a/taglib/mpeg/id3v2/id3v2framefactory.cpp
+++ b/taglib/mpeg/id3v2/id3v2framefactory.cpp
@@ -72,7 +72,7 @@ namespace
         bool ok;
         int number = genreCode.toInt(&ok);
         if((ok && number >= 0 && number <= 255 &&
-            !(ID3v1::genre(number) == s)) ||
+            ID3v1::genre(number) != s) ||
            genreCode == "RX" || genreCode == "CR")
           newfields.append(genreCode);
       }
diff --git a/taglib/ogg/xiphcomment.cpp b/taglib/ogg/xiphcomment.cpp
index 9903c51c..0e7b520e 100644
--- a/taglib/ogg/xiphcomment.cpp
+++ b/taglib/ogg/xiphcomment.cpp
@@ -220,7 +220,7 @@ PropertyMap Ogg::XiphComment::setProperties(const PropertyMap &properties)
   for(const auto &[key, sl] : properties) {
     if(!checkKey(key))
       invalid.insert(key, sl);
-    else if(!d->fieldListMap.contains(key) || !(sl == d->fieldListMap[key])) {
+    else if(!d->fieldListMap.contains(key) || sl != d->fieldListMap[key]) {
       if(sl.isEmpty())
         // zero size string list -> remove the tag with all values
         removeFields(key);