diff --git a/data/shaders/ssao.frag b/data/shaders/ssao.frag
index 641e3f911..91e528b82 100644
--- a/data/shaders/ssao.frag
+++ b/data/shaders/ssao.frag
@@ -40,7 +40,7 @@ void main(void)
     float bl = 0.0;
     float m = log2(r) + 6 + log2(invSamples);
 
-    float theta = mod(2. * 3.14 * tau * .5 * invSamples + phi, 360.);
+    float theta = radians(mod(degrees(2. * 3.14 * tau * .5 * invSamples + phi), 360.));
     vec2 rotations = vec2(cos(theta), sin(theta)) * screen;
     vec2 offset = vec2(cos(invSamples), sin(invSamples));