4 files changed, 5 insertions, 5 deletions
diff --git a/examples/opengl/hellowindow/hellowindow.h b/examples/opengl/hellowindow/hellowindow.h
index 0a88a0d75e..ea59b3f127 100644
--- a/examples/opengl/hellowindow/hellowindow.h
+++ b/examples/opengl/hellowindow/hellowindow.h
@@ -55,7 +55,7 @@ class Renderer : public QObject
 {
     Q_OBJECT
 public:
-    Renderer(const QSurfaceFormat &format, Renderer *share = 0, QScreen *screen = 0);
+    explicit Renderer(const QSurfaceFormat &format, Renderer *share = 0, QScreen *screen = 0);
 
     QSurfaceFormat format() const { return m_format; }
 
diff --git a/examples/opengl/pbuffers/cube.h b/examples/opengl/pbuffers/cube.h
index ad56e43e49..81e82637cb 100644
--- a/examples/opengl/pbuffers/cube.h
+++ b/examples/opengl/pbuffers/cube.h
@@ -95,7 +95,7 @@ class TileBuilder
 {
 public:
     enum { bl, br, tr, tl };
-    TileBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
+    explicit TileBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
     Tile *newTile(const QVector3D &loc = QVector3D()) const;
     void setColor(QColor c) { color = c; }
 protected:
@@ -140,7 +140,7 @@ private:
 class CubeBuilder : public TileBuilder
 {
 public:
-    CubeBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
+    explicit CubeBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
     Cube *newCube(const QVector3D &loc = QVector3D()) const;
 private:
     mutable int ix;
diff --git a/examples/opengl/shared/qtlogo.h b/examples/opengl/shared/qtlogo.h
index d55fb0834c..3f608180c2 100644
--- a/examples/opengl/shared/qtlogo.h
+++ b/examples/opengl/shared/qtlogo.h
@@ -51,7 +51,7 @@ struct Geometry;
 class QtLogo : public QObject
 {
 public:
-    QtLogo(QObject *parent, int d = 64, qreal s = 1.0);
+    explicit QtLogo(QObject *parent, int d = 64, qreal s = 1.0);
     ~QtLogo();
     void setColor(QColor c);
     void draw() const;
diff --git a/examples/opengl/textures/glwidget.h b/examples/opengl/textures/glwidget.h
index be120e02d0..9dccd339fe 100644
--- a/examples/opengl/textures/glwidget.h
+++ b/examples/opengl/textures/glwidget.h
@@ -51,7 +51,7 @@ class GLWidget : public QGLWidget
     Q_OBJECT
 
 public:
-    GLWidget(QWidget *parent = 0, QGLWidget *shareWidget = 0);
+    explicit GLWidget(QWidget *parent = 0, QGLWidget *shareWidget = 0);
     ~GLWidget();
 
     QSize minimumSizeHint() const;