diff --git a/bin/resources/shaders/vulkan/cas.glsl b/bin/resources/shaders/vulkan/cas.glsl
index 4099852998..8a71173095 100644
--- a/bin/resources/shaders/vulkan/cas.glsl
+++ b/bin/resources/shaders/vulkan/cas.glsl
@@ -53,7 +53,7 @@ void main()
     AU2 gxy = ARmp8x8(gl_LocalInvocationID.x)+AU2(gl_WorkGroupID.x<<4u,gl_WorkGroupID.y<<4u);
 
     // Filter.
-    AF4 c;
+    AF4 c = vec4(0.0f);
     CasFilter(c.r, c.g, c.b, gxy, const0, const1, sharpenOnly != 0);
     imageStore(imgDst, ASU2(gxy), c);
     gxy.x += 8u;
diff --git a/bin/resources/shaders/vulkan/convert.glsl b/bin/resources/shaders/vulkan/convert.glsl
index e780c1b9e3..46acdbee45 100644
--- a/bin/resources/shaders/vulkan/convert.glsl
+++ b/bin/resources/shaders/vulkan/convert.glsl
@@ -348,7 +348,7 @@ layout(push_constant) uniform cb10
 void ps_yuv()
 {
 	vec4 i = sample_c(v_tex);
-	vec4 o;
+	vec4 o = vec4(0.0f);
 
 	mat3 rgb2yuv;
 	rgb2yuv[0] = vec3(0.587, -0.311, -0.419);
@@ -361,7 +361,8 @@ void ps_yuv()
 	float Cr = float(0xE0)/255.0f * yuv.y + float(0x80)/255.0f;
 	float Cb = float(0xE0)/255.0f * yuv.z + float(0x80)/255.0f;
 
-	switch(EMODA) {
+	switch(EMODA)
+	{
 		case 0:
 			o.a = i.a;
 			break;
@@ -376,7 +377,8 @@ void ps_yuv()
 			break;
 	}
 
-	switch(EMODC) {
+	switch(EMODC)
+	{
 		case 0:
 			o.rgb = i.rgb;
 			break;