diff --git a/src/video_core/host_shaders/vulkan_present.frag b/src/video_core/host_shaders/vulkan_present.frag
index 41c0916bd..cd080eced 100644
--- a/src/video_core/host_shaders/vulkan_present.frag
+++ b/src/video_core/host_shaders/vulkan_present.frag
@@ -24,6 +24,7 @@ vec4 GetScreen(int screen_id) {
 #ifdef ARRAY_DYNAMIC_INDEX
     return texture(screen_textures[screen_id], frag_tex_coord);
 #else
+// Not all vulkan drivers support shaderSampledImageArrayDynamicIndexing, so index manually.
     switch (screen_id) {
     case 0:
         return texture(screen_textures[0], frag_tex_coord);
diff --git a/src/video_core/host_shaders/vulkan_present_anaglyph.frag b/src/video_core/host_shaders/vulkan_present_anaglyph.frag
index a01ce63f6..6a6b16787 100644
--- a/src/video_core/host_shaders/vulkan_present_anaglyph.frag
+++ b/src/video_core/host_shaders/vulkan_present_anaglyph.frag
@@ -36,6 +36,7 @@ vec4 GetScreen(int screen_id) {
 #ifdef ARRAY_DYNAMIC_INDEX
     return texture(screen_textures[screen_id], frag_tex_coord);
 #else
+// Not all vulkan drivers support shaderSampledImageArrayDynamicIndexing, so index manually.
     switch (screen_id) {
     case 0:
         return texture(screen_textures[0], frag_tex_coord);
diff --git a/src/video_core/host_shaders/vulkan_present_interlaced.frag b/src/video_core/host_shaders/vulkan_present_interlaced.frag
index b033a9dec..f763de963 100644
--- a/src/video_core/host_shaders/vulkan_present_interlaced.frag
+++ b/src/video_core/host_shaders/vulkan_present_interlaced.frag
@@ -24,6 +24,7 @@ vec4 GetScreen(int screen_id) {
 #ifdef ARRAY_DYNAMIC_INDEX
     return texture(screen_textures[screen_id], frag_tex_coord);
 #else
+// Not all vulkan drivers support shaderSampledImageArrayDynamicIndexing, so index manually.
     switch (screen_id) {
     case 0:
         return texture(screen_textures[0], frag_tex_coord);