diff --git a/libi2pd/NetDb.hpp b/libi2pd/NetDb.hpp
index afd1f562..845217e1 100644
--- a/libi2pd/NetDb.hpp
+++ b/libi2pd/NetDb.hpp
@@ -44,6 +44,7 @@ namespace data
 	const int NETDB_PUBLISH_CONFIRMATION_TIMEOUT = 5; // in seconds
 	const int NETDB_MAX_PUBLISH_EXCLUDED_FLOODFILLS = 15; 
 	const int NETDB_MIN_HIGHBANDWIDTH_VERSION = MAKE_VERSION_NUMBER(0, 9, 36); // 0.9.36
+	const int NETDB_MIN_FLOODFILL_VERSION = MAKE_VERSION_NUMBER(0, 9, 28); // 0.9.28
 
 	/** function for visiting a leaseset stored in a floodfill */
 	typedef std::function<void(const IdentHash, std::shared_ptr<LeaseSet>)> LeaseSetVisitor;
diff --git a/libi2pd/RouterInfo.cpp b/libi2pd/RouterInfo.cpp
index 3fc512f6..13776b81 100644
--- a/libi2pd/RouterInfo.cpp
+++ b/libi2pd/RouterInfo.cpp
@@ -948,5 +948,12 @@ namespace data
 		if (encryptor)
 			encryptor->Encrypt (data, encrypted, ctx, true);
 	}
+
+	bool RouterInfo::IsEligibleFloodfill () const 
+	{
+		// floodfill must be reachable, >= 0.9.28 and not DSA
+		return IsReachable () && m_Version >= NETDB_MIN_FLOODFILL_VERSION &&
+			GetIdentity ()->GetSigningKeyType () != SIGNING_KEY_TYPE_DSA_SHA1; 
+	}	
 }
 }
diff --git a/libi2pd/RouterInfo.h b/libi2pd/RouterInfo.h
index a4b2fd22..733ea44a 100644
--- a/libi2pd/RouterInfo.h
+++ b/libi2pd/RouterInfo.h
@@ -184,8 +184,7 @@ namespace data
 			bool IsHidden () const { return m_Caps & eHidden; };
 			bool IsHighBandwidth () const { return m_Caps & RouterInfo::eHighBandwidth; };
 			bool IsExtraBandwidth () const { return m_Caps & RouterInfo::eExtraBandwidth; };
-			// floodfill must be reachable and not DSA
-			bool IsEligibleFloodfill () const { return IsReachable () && GetIdentity ()->GetSigningKeyType () != SIGNING_KEY_TYPE_DSA_SHA1; };
+			bool IsEligibleFloodfill () const;
 		
 			uint8_t GetCaps () const { return m_Caps; };
 			void SetCaps (uint8_t caps);