diff --git a/wadsrc/static/shaders/glsl/fuzz_noise.fp b/wadsrc/static/shaders/glsl/fuzz_noise.fp
index b11f1800c..17f15d03b 100644
--- a/wadsrc/static/shaders/glsl/fuzz_noise.fp
+++ b/wadsrc/static/shaders/glsl/fuzz_noise.fp
@@ -5,6 +5,7 @@ vec4 ProcessTexel()
 {
 	vec2 texCoord = vTexCoord.st;
 	vec4 basicColor = getTexel(texCoord);
+	ivec2 texSize = textureSize(tex, 0);
 
 	texCoord.x = float( int(texCoord.x * texSize.x) ) / texSize.x;
 	texCoord.y = float( int(texCoord.y * texSize.y) ) / texSize.y;
diff --git a/wadsrc/static/shaders/glsl/fuzz_standard.fp b/wadsrc/static/shaders/glsl/fuzz_standard.fp
index 02624073e..95ba52431 100644
--- a/wadsrc/static/shaders/glsl/fuzz_standard.fp
+++ b/wadsrc/static/shaders/glsl/fuzz_standard.fp
@@ -5,6 +5,7 @@ vec4 ProcessTexel()
 {
 	vec2 texCoord = vTexCoord.st;
 	vec4 basicColor = getTexel(texCoord);
+	ivec2 texSize = textureSize(tex, 0);
 
 	texCoord.x = float( int(texCoord.x * texSize.x) ) / texSize.x;
 	texCoord.y = float( int(texCoord.y * texSize.y) ) / texSize.y;