3 files changed, 6 insertions, 3 deletions
diff --git a/doc/python_api/examples/gpu.10.py b/doc/python_api/examples/gpu.10.py
index 2f255b7127d..8e354dd09a8 100644
--- a/doc/python_api/examples/gpu.10.py
+++ b/doc/python_api/examples/gpu.10.py
@@ -33,11 +33,12 @@ fragment_shader = '''
     uniform float u_Scale;
 
     in float v_ArcLength;
+    out vec4 FragColor;
 
     void main()
     {
         if (step(sin(v_ArcLength * u_Scale), 0.5) == 1) discard;
-        gl_FragColor = vec4(1.0);
+        FragColor = vec4(1.0);
     }
 '''
 
diff --git a/doc/python_api/examples/gpu.2.py b/doc/python_api/examples/gpu.2.py
index 4bee9acebe3..565ec5d5d0c 100644
--- a/doc/python_api/examples/gpu.2.py
+++ b/doc/python_api/examples/gpu.2.py
@@ -23,10 +23,11 @@ fragment_shader = '''
     uniform float brightness;
 
     in vec3 pos;
+    out vec4 FragColor;
 
     void main()
     {
-        gl_FragColor = vec4(pos * brightness, 1.0);
+        FragColor = vec4(pos * brightness, 1.0);
     }
 '''
 
diff --git a/doc/python_api/examples/gpu.7.py b/doc/python_api/examples/gpu.7.py
index d6055898807..80cda45e690 100644
--- a/doc/python_api/examples/gpu.7.py
+++ b/doc/python_api/examples/gpu.7.py
@@ -56,10 +56,11 @@ fragment_shader = '''
     uniform sampler2D image;
 
     in vec2 uvInterp;
+    out vec4 FragColor;
 
     void main()
     {
-        gl_FragColor = texture(image, uvInterp);
+        FragColor = texture(image, uvInterp);
     }
 '''