diff --git a/include/dwarfs/checksum.h b/include/dwarfs/checksum.h
index 6554acbf..f93b35be 100644
--- a/include/dwarfs/checksum.h
+++ b/include/dwarfs/checksum.h
@@ -34,7 +34,6 @@ namespace dwarfs {
 class checksum {
  public:
   enum class algorithm {
-    SHA1,
     SHA2_512_256,
     XXH3_64,
     XXH3_128,
@@ -56,8 +55,6 @@ class checksum {
 
   bool finalize(void* digest) const { return impl_->finalize(digest); }
 
-  bool verify(void const* digest) const;
-
   size_t digest_size() const { return impl_->digest_size(); }
 
   class impl {
diff --git a/src/dwarfs/checksum.cpp b/src/dwarfs/checksum.cpp
index 1876368a..37f72537 100644
--- a/src/dwarfs/checksum.cpp
+++ b/src/dwarfs/checksum.cpp
@@ -193,9 +193,6 @@ bool checksum::verify(algorithm alg, void const* data, size_t size,
 
 checksum::checksum(algorithm alg) {
   switch (alg) {
-  case algorithm::SHA1:
-    impl_ = std::make_unique<checksum_evp>(::EVP_sha1());
-    break;
   case algorithm::SHA2_512_256:
     impl_ = std::make_unique<checksum_evp>(::EVP_sha512_256());
     break;
@@ -223,10 +220,4 @@ checksum::checksum(std::string const& alg) {
   }
 }
 
-bool checksum::verify(void const* digest) const {
-  std::array<char, EVP_MAX_MD_SIZE> tmp;
-  return impl_->finalize(tmp.data()) &&
-         ::memcmp(digest, tmp.data(), impl_->digest_size()) == 0;
-}
-
 } // namespace dwarfs