diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07fa9c953329..99753fab4788 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Ensure `@import "…" reference` never generates utilities ([#15307](https://github.com/tailwindlabs/tailwindcss/pull/15307))
+- Fix dependency related warnings when using `@tailwindcss/postcss` on Windows
 
 ## [4.0.0-beta.5] - 2024-12-04
 
diff --git a/packages/@tailwindcss-postcss/src/index.ts b/packages/@tailwindcss-postcss/src/index.ts
index d40d34bc3d98..a58820e7140a 100644
--- a/packages/@tailwindcss-postcss/src/index.ts
+++ b/packages/@tailwindcss-postcss/src/index.ts
@@ -106,7 +106,7 @@ function tailwindcss(opts: PluginOptions = {}): AcceptedPlugin {
               result.messages.push({
                 type: 'dependency',
                 plugin: '@tailwindcss/postcss',
-                file,
+                file: path.resolve(file),
                 parent: result.opts.from,
               })
             }
@@ -174,7 +174,7 @@ function tailwindcss(opts: PluginOptions = {}): AcceptedPlugin {
               result.messages.push({
                 type: 'dependency',
                 plugin: '@tailwindcss/postcss',
-                file,
+                file: path.resolve(file),
                 parent: result.opts.from,
               })
             }
@@ -194,14 +194,14 @@ function tailwindcss(opts: PluginOptions = {}): AcceptedPlugin {
                 result.messages.push({
                   type: 'dependency',
                   plugin: '@tailwindcss/postcss',
-                  file: globBase,
+                  file: path.resolve(globBase),
                   parent: result.opts.from,
                 })
               } else {
                 result.messages.push({
                   type: 'dir-dependency',
                   plugin: '@tailwindcss/postcss',
-                  dir: globBase,
+                  dir: path.resolve(globBase),
                   glob: pattern,
                   parent: result.opts.from,
                 })