diff --git a/intern/cycles/kernel/osl/nodes/node_layer_weight.osl b/intern/cycles/kernel/osl/nodes/node_layer_weight.osl
index dc3eb81d712..40b60fee7d3 100644
--- a/intern/cycles/kernel/osl/nodes/node_layer_weight.osl
+++ b/intern/cycles/kernel/osl/nodes/node_layer_weight.osl
@@ -36,7 +36,7 @@ shader node_layer_weight(
 	Facing = abs(dot(I, Normal));
 
 	if (blend != 0.5) {
-		blend = clamp(blend, 0.0, 1.0); 
+		blend = clamp(blend, 0.0, 1.0-1e-5); 
 		blend = (blend < 0.5) ? 2.0 * blend : 0.5 / (1.0 - blend);
 
 		Facing = pow(Facing, blend);
diff --git a/intern/cycles/kernel/svm/svm_fresnel.h b/intern/cycles/kernel/svm/svm_fresnel.h
index 7684eabeecb..d5b415a87ce 100644
--- a/intern/cycles/kernel/svm/svm_fresnel.h
+++ b/intern/cycles/kernel/svm/svm_fresnel.h
@@ -54,7 +54,7 @@ __device void svm_node_layer_weight(ShaderData *sd, float *stack, uint4 node)
 		f = fabsf(dot(sd->I, sd->N));
 
 		if(blend != 0.5f) {
-			blend = clamp(blend, 0.0f, 1.0f);
+			blend = clamp(blend, 0.0f, 1.0f-1e-5f);
 			blend = (blend < 0.5f)? 2.0f*blend: 0.5f/(1.0f - blend);
 
 			f = powf(f, blend);