diff --git a/src/texture-utils.js b/src/texture-utils.js
index 9a6691a..c1276d6 100644
--- a/src/texture-utils.js
+++ b/src/texture-utils.js
@@ -63,6 +63,7 @@ const DEPTH_COMPONENT24            = 0x81A6;
 const DEPTH_COMPONENT32F           = 0x8CAC;
 const DEPTH32F_STENCIL8            = 0x8CAD;
 const DEPTH24_STENCIL8             = 0x88F0;
+const STENCIL_INDEX8               = 0x8d48;
 
 /* DataType */
 // const BYTE                         = 0x1400;
@@ -196,6 +197,7 @@ function getTextureInternalFormatInfo(internalFormat) {
     t[DEPTH_COMPONENT32F] = { bytesPerElement: [4],  };
     t[DEPTH24_STENCIL8]   = { bytesPerElement: [4],  };
     t[DEPTH32F_STENCIL8]  = { bytesPerElement: [4],  };
+    t[STENCIL_INDEX8]     = { bytesPerElement: [1],  };
 
     s_textureInternalFormatInfo = t;
   }
diff --git a/test/tests/renderbuffer-tests.js b/test/tests/renderbuffer-tests.js
index f2417ae..ef2b31f 100644
--- a/test/tests/renderbuffer-tests.js
+++ b/test/tests/renderbuffer-tests.js
@@ -49,6 +49,28 @@ describe('renderbuffer tests', () => {
     tracker.deleteObjectAndMemory(size2);
   });
 
+  it('test renderbufferStorage STENCIL_INDEX8', () => {
+    const {gl} = createContext();
+    const tracker = new MemInfoTracker(gl, 'renderbuffer');
+
+    const rb1 = gl.createRenderbuffer();
+    tracker.addObjects(1);
+
+    gl.bindRenderbuffer(gl.RENDERBUFFER, rb1);
+    let size1a;
+    {
+      const width = 17;
+      const height = 49;
+      gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, width, height);
+      size1a = width * height;
+      tracker.addMemory(size1a);
+    }
+
+    gl.deleteRenderbuffer(rb1);
+    tracker.deleteObjectAndMemory(size1a);
+  });
+
+
   it('test renderbufferStorageMultisample', () => {
     const {gl} = createContext2();
     if (!gl) {