diff --git a/src/gui/opengl/qopenglshaderprogram.cpp b/src/gui/opengl/qopenglshaderprogram.cpp
index 5de79c9e1ee..41d53be31e7 100644
--- a/src/gui/opengl/qopenglshaderprogram.cpp
+++ b/src/gui/opengl/qopenglshaderprogram.cpp
@@ -1776,7 +1776,7 @@ void QOpenGLShaderProgram::setAttributeBuffer
     Q_UNUSED(d);
     if (location != -1) {
         d->glfuncs->glVertexAttribPointer(location, tupleSize, type, GL_TRUE, stride,
-                              reinterpret_cast<const void *>(offset));
+                              reinterpret_cast<const void *>(qintptr(offset)));
     }
 }
 
diff --git a/src/gui/opengl/qtriangulatingstroker.cpp b/src/gui/opengl/qtriangulatingstroker.cpp
index cfbf8a75c54..5967bd6e89b 100644
--- a/src/gui/opengl/qtriangulatingstroker.cpp
+++ b/src/gui/opengl/qtriangulatingstroker.cpp
@@ -127,7 +127,7 @@ void QTriangulatingStroker::process(const QVectorPath &path, const QPen &pen, co
         m_roundness = 1;
     } else if (cosmetic) {
         m_curvyness_add = realWidth / 2;
-        m_curvyness_mul = CURVE_FLATNESS;
+        m_curvyness_mul = float(CURVE_FLATNESS);
         m_roundness = qMax<int>(4, realWidth * CURVE_FLATNESS);
     } else {
         m_curvyness_add = m_width;
@@ -543,7 +543,7 @@ void QDashedStrokeProcessor::process(const QVectorPath &path, const QPen &pen, c
         curvynessMul = CURVE_FLATNESS / m_inv_scale;
     } else if (cosmetic) {
         curvynessAdd= width / 2;
-        curvynessMul= CURVE_FLATNESS;
+        curvynessMul= float(CURVE_FLATNESS);
     } else {
         curvynessAdd = width * m_inv_scale;
         curvynessMul = CURVE_FLATNESS / m_inv_scale;
diff --git a/src/opengl/qglshaderprogram.cpp b/src/opengl/qglshaderprogram.cpp
index c0122eb59f3..abd4a59fb80 100644
--- a/src/opengl/qglshaderprogram.cpp
+++ b/src/opengl/qglshaderprogram.cpp
@@ -1706,7 +1706,7 @@ void QGLShaderProgram::setAttributeBuffer
     Q_UNUSED(d);
     if (location != -1) {
         d->glfuncs->glVertexAttribPointer(location, tupleSize, type, GL_TRUE, stride,
-                              reinterpret_cast<const void *>(offset));
+                              reinterpret_cast<const void *>(qintptr(offset)));
     }
 }