diff --git a/ext/snmp/snmp.c b/ext/snmp/snmp.c
index db2d0ad8786..0ff8d41c1e6 100644
--- a/ext/snmp/snmp.c
+++ b/ext/snmp/snmp.c
@@ -34,7 +34,6 @@
 #include "php_snmp.h"
 
 #include "zend_exceptions.h"
-#include "zend_smart_string.h"
 #include "ext/spl/spl_exceptions.h"
 
 #ifdef HAVE_SNMP