diff --git a/engine/src/core-data/Common/MatDefs/Light/Lighting.frag b/engine/src/core-data/Common/MatDefs/Light/Lighting.frag
index 7709de54b..829f762c9 100644
--- a/engine/src/core-data/Common/MatDefs/Light/Lighting.frag
+++ b/engine/src/core-data/Common/MatDefs/Light/Lighting.frag
@@ -149,7 +149,7 @@ void main(){
     #endif
     #ifndef VERTEX_LIGHTING
         float spotFallOff = 1.0;
-        if(spotVec.w!=0){
+        if(spotVec.w!=0.0){
               vec3 L=normalize(lightVec.xyz);
               vec3 spotdir = normalize(spotVec.xyz);
               float curAngleCos = dot(-L, spotdir);             
diff --git a/engine/src/core-data/Common/MatDefs/Light/Lighting.vert b/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
index 3f2d30930..419b800c9 100644
--- a/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
+++ b/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
@@ -112,7 +112,7 @@ vec2 computeLighting(in vec3 wvPos, in vec3 wvNorm, in vec3 wvViewDir, in vec4 w
      vec4 lightDir;
      lightComputeDir(wvPos, g_LightColor, wvLightPos, lightDir);
      float spotFallOff = 1.0;
-     if(spotVec.w!=0){
+     if(spotVec.w!=0.0){
           vec3 L=normalize(lightVec.xyz);
           vec3 spotdir = normalize(spotVec.xyz);
           float curAngleCos = dot(-L, spotdir);             
diff --git a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.frag b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.frag
index 5e26a1011..e9f2e8467 100644
--- a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.frag
+++ b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.frag
@@ -647,7 +647,7 @@ void main(){
     #endif
 
         float spotFallOff = 1.0;
-        if(spotVec.w!=0){
+        if(spotVec.w!=0.0){
               vec3 L=normalize(lightVec.xyz);
               vec3 spotdir = normalize(spotVec.xyz);
               float curAngleCos = dot(-L, spotdir);