diff --git a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/frag.glsl b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/frag.glsl
index 16818b98ef..54ddd3cfe6 100644
--- a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/frag.glsl
+++ b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/frag.glsl
@@ -31,7 +31,7 @@ uniform float smoothBanding;
 uniform vec4 fogColor;
 
 in vec4 Color;
-centroid in float fHsl;
+noperspective centroid in float fHsl;
 flat in int textureId;
 in vec2 fUv;
 in float fogAmount;
diff --git a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/vert.glsl b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/vert.glsl
index 0f1a626259..613d95aa51 100644
--- a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/vert.glsl
+++ b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/vert.glsl
@@ -54,7 +54,7 @@ uniform int drawDistance;
 uniform mat4 projectionMatrix;
 
 out vec4 Color;
-centroid out float fHsl;
+noperspective centroid out float fHsl;
 flat out int textureId;
 out vec2 fUv;
 out float fogAmount;