diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 4688d946def3a27023393c4d33f05cb37866af55..c97a09ab1d2a625ab631159f6d9ed8bfbf734b3e 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -51,6 +51,7 @@
 #define DEBUG_PBR_DOT_TV           0 // Output: grayscale dot(Tangent  ,Vertex2Camera)
 #define DEBUG_PBR_DOT_BV           0 // Output: graysacle dot(Bitangent,Vertex2Camera)
 #define DEBUG_PBR_FRESNEL          0 // Output: roughness dependent fresnel
+#define DEBUG_PBR_KSPEC            0 // Output: K spec
 #define DEBUG_PBR_IOR              0 // Output: grayscale IOR
 #define DEBUG_PBR_REFLECT0_BASE    0 // Output: black reflect0 default from ior
 #define DEBUG_PBR_REFLECT0_MIX     0 // Output: diffuse reflect0 calculated from ior