diff --git a/ext/xslt/sablot.c b/ext/xslt/sablot.c
index 474f77f221f..b8de408f95b 100644
--- a/ext/xslt/sablot.c
+++ b/ext/xslt/sablot.c
@@ -554,8 +554,7 @@ PHP_FUNCTION(xslt_process)
 			/* Since we have args passed, we need to set the base uri, so pull in executor
 				globals and set the base, using the current filename, specifally for the
 				'arg' scheme */
-			baseuri = (char *)emalloc(strlen(zend_get_executed_filename(TSRMLS_C))+7+1);
-			sprintf(baseuri, "file://%s", zend_get_executed_filename(TSRMLS_C));
+				spprintf(&baseuri, 0, "file://%s", zend_get_executed_filename(TSRMLS_C));
 
 			SablotSetBaseForScheme(XSLT_PROCESSOR(handle), "arg", baseuri);