diff --git a/three/index.d.ts b/three/index.d.ts
index 3fa2c60b12..9e1cccd0b7 100644
--- a/three/index.d.ts
+++ b/three/index.d.ts
@@ -2737,7 +2737,7 @@ declare namespace THREE {
         constructor(parameters?: ShaderMaterialParameters);
 
         defines: any;
-        uniforms: any; // type should be  { [uniform: string]: { value: any }; };    but gives "Index signature is missing in type" error during compilation
+        uniforms: { [uniform: string]: IUniform };
         vertexShader: string;
         fragmentShader: string;
         linewidth: number;
@@ -5115,7 +5115,7 @@ declare namespace THREE {
     };
 
     export interface Shader {
-        uniforms: IUniform;
+        uniforms: { [uniform: string]: IUniform };
         vertexShader: string;
         fragmentShader: string;
     }