diff --git a/drivers/gles3/shaders/sky.glsl b/drivers/gles3/shaders/sky.glsl
index 727eaa6575..f2292dee68 100644
--- a/drivers/gles3/shaders/sky.glsl
+++ b/drivers/gles3/shaders/sky.glsl
@@ -157,7 +157,7 @@ float acos_approx(float p_x) {
 	float x = abs(p_x);
 	float res = -0.156583f * x + (M_PI / 2.0);
 	res *= sqrt(1.0f - x);
-	return (p_x >= 0) ? res : M_PI - res;
+	return (p_x >= 0.0) ? res : M_PI - res;
 }
 
 // Based on https://math.stackexchange.com/questions/1098487/atan2-faster-approximation
diff --git a/servers/rendering/renderer_rd/shaders/environment/sky.glsl b/servers/rendering/renderer_rd/shaders/environment/sky.glsl
index 4b57648eb3..5c42b19919 100644
--- a/servers/rendering/renderer_rd/shaders/environment/sky.glsl
+++ b/servers/rendering/renderer_rd/shaders/environment/sky.glsl
@@ -193,7 +193,7 @@ float acos_approx(float p_x) {
 	float x = abs(p_x);
 	float res = -0.156583f * x + (M_PI / 2.0);
 	res *= sqrt(1.0f - x);
-	return (p_x >= 0) ? res : M_PI - res;
+	return (p_x >= 0.0) ? res : M_PI - res;
 }
 
 // Based on https://math.stackexchange.com/questions/1098487/atan2-faster-approximation