diff --git a/lib/ipaddress/ipv4.rb b/lib/ipaddress/ipv4.rb
index 7d8e0d3..3ad2c15 100644
--- a/lib/ipaddress/ipv4.rb
+++ b/lib/ipaddress/ipv4.rb
@@ -512,6 +512,7 @@ def <=>(oth)
       return prefix <=> oth.prefix if to_u32 == oth.to_u32  
       to_u32 <=> oth.to_u32
     end
+    alias eql? ==
     
     #
     # Returns the number of IP addresses included
diff --git a/lib/ipaddress/ipv6.rb b/lib/ipaddress/ipv6.rb
index 88098bc..2dda4d2 100644
--- a/lib/ipaddress/ipv6.rb
+++ b/lib/ipaddress/ipv6.rb
@@ -490,6 +490,7 @@ def <=>(oth)
       return prefix <=> oth.prefix if to_u128 == oth.to_u128  
       to_u128 <=> oth.to_u128
     end
+    alias eql? ==
 
     #
     # Returns the address portion of an IP in binary format,