diff --git a/src/common/utils.cc b/src/common/utils.cc
index c052c17a..b431e2fd 100644
--- a/src/common/utils.cc
+++ b/src/common/utils.cc
@@ -30,7 +30,8 @@ std::string c_string( const QString & str )
 
 bool endsWithIgnoreCase( QByteArrayView str, QByteArrayView extension )
 {
-  return ( str.size() >= extension.size() ) && str.last( extension.size() ).compare( extension, Qt::CaseInsensitive );
+  return ( str.size() >= extension.size() )
+    && ( str.last( extension.size() ).compare( extension, Qt::CaseInsensitive ) == 0 );
 }
 
 QString escapeAmps( QString const & str )
diff --git a/src/dict/dsl.cc b/src/dict/dsl.cc
index 43907b31..f5aef6de 100644
--- a/src/dict/dsl.cc
+++ b/src/dict/dsl.cc
@@ -1736,7 +1736,7 @@ vector< sptr< Dictionary::Class > > makeDictionaries( vector< string > const & f
     // Make sure it's not an abbreviation file. extSize of ".dsl" or ".dsl.dz"
 
     if ( int extSize = ( uncompressedDsl ? 4 : 7 ); ( fileName.size() >= ( 5 + extSize ) )
-         && QByteArrayView( fileName ).chopped( extSize ).last( 5 ).compare( "_abrv", Qt::CaseInsensitive ) ) {
+         && ( QByteArrayView( fileName ).chopped( extSize ).last( 5 ).compare( "_abrv", Qt::CaseInsensitive ) == 0 ) ) {
       // It is, skip it
       continue;
     }
diff --git a/src/langcoder.cc b/src/langcoder.cc
index 5f2029c3..04a3c093 100644
--- a/src/langcoder.cc
+++ b/src/langcoder.cc
@@ -231,7 +231,7 @@ quint32 LangCoder::findIdForLanguage( gd::wstring const & lang )
   const auto langFolded = QByteArrayView( Utf8::encode( lang ) );
 
   for ( auto const & lc : LANG_CODE_MAP ) {
-    if ( langFolded.compare( lc.lang, Qt::CaseInsensitive ) ) {
+    if ( langFolded.compare( lc.lang, Qt::CaseInsensitive ) == 0 ) {
       return code2toInt( lc.code2.toStdString().c_str() );
     }
   }