diff --git a/libs/apkverify/src/algorithms.rs b/libs/apkverify/src/algorithms.rs
index 6d4362b..ed2c1fc 100644
--- a/libs/apkverify/src/algorithms.rs
+++ b/libs/apkverify/src/algorithms.rs
@@ -102,7 +102,7 @@
                 self,
                 SignatureAlgorithmID::DsaWithSha256 | SignatureAlgorithmID::VerityDsaWithSha256
             ),
-            "TODO(b/197052981): Algorithm '{:?}' is not implemented.",
+            "Algorithm '{:?}' is not supported in openssl to build this verifier (b/197052981).",
             self
         );
         ensure!(public_key.id() == self.pkey_id(), "Public key has the wrong ID");
@@ -130,6 +130,14 @@
         }
     }
 
+    /// DSA is not directly supported in openssl today. See b/197052981.
+    pub(crate) fn is_supported(&self) -> bool {
+        !matches!(
+            self,
+            SignatureAlgorithmID::DsaWithSha256 | SignatureAlgorithmID::VerityDsaWithSha256,
+        )
+    }
+
     fn pkey_id(&self) -> pkey::Id {
         match self {
             SignatureAlgorithmID::RsaPssWithSha256
diff --git a/libs/apkverify/src/v3.rs b/libs/apkverify/src/v3.rs
index 2a16cb1..5272834 100644
--- a/libs/apkverify/src/v3.rs
+++ b/libs/apkverify/src/v3.rs
@@ -139,7 +139,7 @@
         Ok(self
             .signatures
             .iter()
-            .filter(|sig| sig.signature_algorithm_id.is_some())
+            .filter(|sig| sig.signature_algorithm_id.map_or(false, |algo| algo.is_supported()))
             .max_by_key(|sig| sig.signature_algorithm_id.unwrap().content_digest_algorithm())
             .context("No supported signatures found")?)
     }