diff --git a/eng/pipelines/templates/jobs/sdk-build.yml b/eng/pipelines/templates/jobs/sdk-build.yml
index 67d02032d6b3..c1ec3d7dfcd1 100644
--- a/eng/pipelines/templates/jobs/sdk-build.yml
+++ b/eng/pipelines/templates/jobs/sdk-build.yml
@@ -131,6 +131,7 @@ jobs:
         displayName: 🟣 Build
         env:
           BuildConfig: $(buildConfiguration)
+          OPENSSL_ENABLE_SHA1_SIGNATURES: 1
 
     ############### TESTING ###############
     - ${{ if eq(parameters.runTests, true) }}: