diff --git a/projects/ecc-diff-fuzzer/build.sh b/projects/ecc-diff-fuzzer/build.sh
index 8e4e68d2e..301022eb8 100755
--- a/projects/ecc-diff-fuzzer/build.sh
+++ b/projects/ecc-diff-fuzzer/build.sh
@@ -63,7 +63,7 @@ make -j$(nproc) all
 (
 cd openssl
 #option to not have the same exported function poly1305_blocks as in gcrypt
-./config no-poly1305
+./config no-poly1305 no-shared no-threads
 make build_generated libcrypto.a
 )