diff --git a/tools/emulator/opengl/host/libs/libOpenglRender/ColorBuffer.cpp b/tools/emulator/opengl/host/libs/libOpenglRender/ColorBuffer.cpp
index 099eeea..adc84d2 100644
--- a/tools/emulator/opengl/host/libs/libOpenglRender/ColorBuffer.cpp
+++ b/tools/emulator/opengl/host/libs/libOpenglRender/ColorBuffer.cpp
@@ -56,10 +56,16 @@
 
     s_gl.glGenTextures(1, &cb->m_tex);
     s_gl.glBindTexture(GL_TEXTURE_2D, cb->m_tex);
+    int nComp = (texInternalFormat == GL_RGB ? 3 : 4);
+    char *zBuff = new char[nComp*p_width*p_height];
+    if (zBuff) {
+        memset(zBuff, 0, nComp*p_width*p_height);
+    }
     s_gl.glTexImage2D(GL_TEXTURE_2D, 0, texInternalFormat,
                       p_width, p_height, 0,
                       texInternalFormat,
-                      GL_UNSIGNED_BYTE, NULL);
+                      GL_UNSIGNED_BYTE, zBuff);
+    delete [] zBuff;
     s_gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     s_gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     s_gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);