diff --git a/Sources/arm/node/MakeMesh.hx b/Sources/arm/node/MakeMesh.hx
index a3a31354..d6e2234a 100644
--- a/Sources/arm/node/MakeMesh.hx
+++ b/Sources/arm/node/MakeMesh.hx
@@ -348,7 +348,7 @@ class MakeMesh {
 					frag.add_uniform('sampler2D senvmapRadiance', '_envmapRadiance');
 					frag.add_uniform('int envmapNumMipmaps', '_envmapNumMipmaps');
 					frag.write('vec3 wreflect = reflect(-vVec, wn);');
-					frag.write('float envlod = roughness * envmapNumMipmaps;');
+					frag.write('float envlod = roughness * float(envmapNumMipmaps);');
 					frag.add_function(MaterialFunctions.str_envMapEquirect);
 					frag.write('vec3 prefilteredColor = textureLod(senvmapRadiance, envMapEquirect(wreflect), envlod).rgb;');