diff --git a/source/blender/draw/engines/eevee/shaders/common_utiltex_lib.glsl b/source/blender/draw/engines/eevee/shaders/common_utiltex_lib.glsl
index 3159241e74d..fdc88fe0b0c 100644
--- a/source/blender/draw/engines/eevee/shaders/common_utiltex_lib.glsl
+++ b/source/blender/draw/engines/eevee/shaders/common_utiltex_lib.glsl
@@ -77,7 +77,7 @@ vec3 lut_coords_btdf(float cos_theta, float roughness, float ior)
 vec2 bsdf_lut(float cos_theta, float roughness, float ior, float do_multiscatter)
 {
   if (ior <= 1e-5) {
-    return vec2(0.0);
+    return vec2(0.0, 1.0);
   }
 
   if (ior >= 1.0) {
diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
index abce514707a..ac2bdf70015 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
@@ -300,7 +300,7 @@ vec2 brdf_lut(float cos_theta, float roughness)
 vec2 bsdf_lut(float cos_theta, float roughness, float ior, float do_multiscatter)
 {
   if (ior <= 1e-5) {
-    return vec2(0.0);
+    return vec2(0.0, 1.0);
   }
 
   if (ior >= 1.0) {