diff --git a/drape/shaders/circle_shader.fsh b/drape/shaders/circle_shader.fsh
index 9571d23325..72d702c683 100644
--- a/drape/shaders/circle_shader.fsh
+++ b/drape/shaders/circle_shader.fsh
@@ -7,7 +7,7 @@ varying vec3 v_radius;
 void main(void)
 {
   vec4 finalColor = texture2D(u_colorTex, v_colorTexCoords);
-  float stepValue = step(pow(v_radius.z, 2.0), pow(v_radius.x, 2.0) + pow(v_radius.y, 2.0));
+  float stepValue = step(v_radius.z * v_radius.z, v_radius.x * v_radius.x + v_radius.y * v_radius.y);
   finalColor.a = finalColor.a * u_opacity * (1.0 - stepValue);
   gl_FragColor = finalColor;
 }