diff --git a/qt5/src/ArthurOutputDev.h b/qt5/src/ArthurOutputDev.h
index 61ec929..20723b7 100644
--- a/qt5/src/ArthurOutputDev.h
+++ b/qt5/src/ArthurOutputDev.h
@@ -48,7 +48,7 @@
 struct SplashGlyphBitmap;
 
 //------------------------------------------------------------------------
-// ArthurOutputDev - Qt 4 QPainter renderer
+// ArthurOutputDev - Qt 5 QPainter renderer
 //------------------------------------------------------------------------
 
 class ArthurOutputDev: public OutputDev {
diff --git a/qt5/src/poppler-annotation.h b/qt5/src/poppler-annotation.h
index bf11390..a70cbe4 100644
--- a/qt5/src/poppler-annotation.h
+++ b/qt5/src/poppler-annotation.h
@@ -154,7 +154,7 @@
  * annotations are always positioned as if they were being positioned at the
  * default page orientation.
  *
- * Just like regular annotations, %Poppler Qt4 exposes normalized coordinates
+ * Just like regular annotations, %Poppler Qt5 exposes normalized coordinates
  * relative to the page's default orientation. However, behind the scenes, the
  * coordinate system is different and %Poppler transparently transforms each
  * shape. If you never call either Annotation::setFlags or
diff --git a/qt5/tests/check_metadata.cpp b/qt5/tests/check_metadata.cpp
index 05abbaf..21262a1 100644
--- a/qt5/tests/check_metadata.cpp
+++ b/qt5/tests/check_metadata.cpp
@@ -33,7 +33,7 @@
     QTest::newRow( "Title" ) << "Title" << "Two pages";
     QTest::newRow( "Subject" ) << "Subject"
 			       << "A two page layout for poppler testing";
-    QTest::newRow( "Keywords" ) << "Keywords" << "Qt4 bindings";
+    QTest::newRow( "Keywords" ) << "Keywords" << "Qt5 bindings";
     QTest::newRow( "Creator" ) << "Creator" << "iText: cgpdftops CUPS filter";
     QTest::newRow( "Producer" ) << "Producer" << "Acrobat Distiller 7.0 for Macintosh";
 }