diff --git a/libraries/graphics/src/graphics/Material.slh b/libraries/graphics/src/graphics/Material.slh
index ecf3c18a0e..76ce336406 100644
--- a/libraries/graphics/src/graphics/Material.slh
+++ b/libraries/graphics/src/graphics/Material.slh
@@ -13,6 +13,9 @@
 
 // The material values (at least the material key) must be precisely bitwise accurate
 // to what is provided by the uniform buffer, or the material key has the wrong bits
+#ifdef GL_ES
+precision highp float;
+#endif
 
 struct Material {
     PRECISIONQ vec4 _emissiveOpacity;