diff --git a/lua/tokyonight/theme.lua b/lua/tokyonight/theme.lua
index 90e093e..d2c202c 100644
--- a/lua/tokyonight/theme.lua
+++ b/lua/tokyonight/theme.lua
@@ -178,6 +178,7 @@ function M.setup()
     DiagnosticWarn = { fg = c.warning }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
     DiagnosticInfo = { fg = c.info }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
     DiagnosticHint = { fg = c.hint }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
+    DiagnosticUnnecessary = { fg = c.terminal_black }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
 
     DiagnosticVirtualTextError = { bg = util.darken(c.error, 0.1), fg = c.error }, -- Used for "Error" diagnostic virtual text
     DiagnosticVirtualTextWarn = { bg = util.darken(c.warning, 0.1), fg = c.warning }, -- Used for "Warning" diagnostic virtual text