diff --git a/src/dict/dsl.cc b/src/dict/dsl.cc
index d02c3614..2f9ac9fc 100644
--- a/src/dict/dsl.cc
+++ b/src/dict/dsl.cc
@@ -1733,13 +1733,13 @@ vector< sptr< Dictionary::Class > > makeDictionaries( vector< string > const & f
       continue;
     }
 
-    // Make sure it's not an abbreviation file
-
+    // Make sure it's not an abbreviation file. extSize of ".dsl" or ".dsl.dz"
     int extSize = ( uncompressedDsl ? 4 : 7 );
-    if ( fileName.size() - extSize >= 5
-         && qstrnicmp( fileName.c_str() + fileName.size() - extSize - 5, "_abrv", 5 ) == 0 ) {
-      // It is, skip it
-      continue;
+    if ( fileName.size() >= ( 5 + extSize ) ) {
+      if ( QByteArrayView( fileName ).chopped( extSize ).last( 5 ).compare( "_abrv", Qt::CaseInsensitive ) ) {
+        // It is, skip it
+        continue;
+      }
     }
 
     unsigned atLine = 0; // Indicates current line in .dsl, for debug purposes