diff --git a/packages/angular_devkit/build_angular/src/utils/esbuild-targets.ts b/packages/angular_devkit/build_angular/src/utils/esbuild-targets.ts
index 1147738e93a9..e9310e171d5a 100644
--- a/packages/angular_devkit/build_angular/src/utils/esbuild-targets.ts
+++ b/packages/angular_devkit/build_angular/src/utils/esbuild-targets.ts
@@ -38,7 +38,7 @@ export function transformSupportedBrowsersToTargets(supportedBrowsers: string[])
     [version] = version.split('-');
 
     if (esBuildSupportedBrowsers.has(browserName)) {
-      if (browserName === 'safari' && version === 'TP') {
+      if (browserName === 'safari' && version === 'tp') {
         // esbuild only supports numeric versions so `TP` is converted to a high number (999) since
         // a Technology Preview (TP) of Safari is assumed to support all currently known features.
         version = '999';