diff --git a/soapclient/SforceBaseClient.php b/soapclient/SforceBaseClient.php
index 4a59196..a08525a 100644
--- a/soapclient/SforceBaseClient.php
+++ b/soapclient/SforceBaseClient.php
@@ -322,8 +322,9 @@ private function setHeaders($call=NULL) {
 			}
 		}
 		
-		
-		$this->sforce->__setSoapHeaders($header_array);
+		if (!empty(array_filter($header_array))) {
+	    		$this->sforce->__setSoapHeaders($header_array);
+		}
 	}
 
 	public function setAssignmentRuleHeader($header) {