diff --git a/ethereum.php b/ethereum.php
index 16901f7..d22012d 100755
--- a/ethereum.php
+++ b/ethereum.php
@@ -187,7 +187,11 @@ function eth_estimateGas($message, $block)
 		}
 		else
 		{
-			return $this->ether_request(__FUNCTION__, $message->toArray());
+			$message_array = $message->toArray();
+			if($block) {
+                            array_push($message_array, $block);
+                        }
+			return $this->ether_request(__FUNCTION__, $message_array);
 		}
 	}
 	
@@ -497,4 +501,4 @@ function toArray()
 			)
 		);
 	}
-}
\ No newline at end of file
+}