3 files changed, 3 insertions, 3 deletions
diff --git a/src/gui/opengl/qopenglframebufferobject.h b/src/gui/opengl/qopenglframebufferobject.h
index 63260f1940..9e69cecc58 100644
--- a/src/gui/opengl/qopenglframebufferobject.h
+++ b/src/gui/opengl/qopenglframebufferobject.h
@@ -67,7 +67,7 @@ public:
         Depth
     };
 
-    QOpenGLFramebufferObject(const QSize &size, GLenum target = GL_TEXTURE_2D);
+    explicit QOpenGLFramebufferObject(const QSize &size, GLenum target = GL_TEXTURE_2D);
     QOpenGLFramebufferObject(int width, int height, GLenum target = GL_TEXTURE_2D);
 #if !defined(QT_OPENGL_ES) || defined(Q_QDOC)
     QOpenGLFramebufferObject(const QSize &size, Attachment attachment,
diff --git a/src/gui/opengl/qopenglfunctions.h b/src/gui/opengl/qopenglfunctions.h
index 4e778dda66..ce36a821b6 100644
--- a/src/gui/opengl/qopenglfunctions.h
+++ b/src/gui/opengl/qopenglfunctions.h
@@ -198,7 +198,7 @@ class Q_GUI_EXPORT QOpenGLFunctions
 {
 public:
     QOpenGLFunctions();
-    QOpenGLFunctions(QOpenGLContext *context);
+    explicit QOpenGLFunctions(QOpenGLContext *context);
     ~QOpenGLFunctions() {}
 
     enum OpenGLFeature
diff --git a/src/gui/opengl/qopenglpaintdevice.h b/src/gui/opengl/qopenglpaintdevice.h
index ce3e7cf278..7d4b901fe7 100644
--- a/src/gui/opengl/qopenglpaintdevice.h
+++ b/src/gui/opengl/qopenglpaintdevice.h
@@ -71,7 +71,7 @@ class Q_GUI_EXPORT QOpenGLPaintDevice : public QPaintDevice
 {
     Q_DECLARE_PRIVATE(QOpenGLPaintDevice)
 public:
-    QOpenGLPaintDevice(const QSize &size);
+    explicit QOpenGLPaintDevice(const QSize &size);
     QOpenGLPaintDevice(int width, int height);
     virtual ~QOpenGLPaintDevice();