diff --git a/libraries/procedural/src/procedural/ProceduralCommon.slf b/libraries/procedural/src/procedural/ProceduralCommon.slf
index 128723265f..d4144ad537 100644
--- a/libraries/procedural/src/procedural/ProceduralCommon.slf
+++ b/libraries/procedural/src/procedural/ProceduralCommon.slf
@@ -264,12 +264,18 @@ float snoise(vec2 v) {
     return 130.0 * dot(m, g);
 }
 
+
 #define PROCEDURAL 1
 
 //PROCEDURAL_VERSION
 
 #ifdef PROCEDURAL_V1
 
+// shader playback time (in seconds)
+uniform float iGlobalTime;
+// the dimensions of the object being rendered
+uniform vec3 iWorldScale;
+
 #else
 
 // Unimplemented uniforms