diff --git a/ext/standard/string.c b/ext/standard/string.c
index cf973300b23..29115fea7a4 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -1811,7 +1811,7 @@ PHP_FUNCTION(strpos)
 
 	if (Z_TYPE_P(needle) == IS_STRING) {
 		if (!Z_STRLEN_P(needle)) {
-			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty delimiter");
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty needle");
 			RETURN_FALSE;
 		}
 
diff --git a/ext/standard/tests/strings/bug63943.phpt b/ext/standard/tests/strings/bug63943.phpt
new file mode 100644
index 00000000000..6018879b24a
--- /dev/null
+++ b/ext/standard/tests/strings/bug63943.phpt
@@ -0,0 +1,8 @@
+--TEST--
+Bug #63943 (Bad warning text from strpos() on empty needle)
+--FILE--
+<?php
+strpos("lllllll", '');
+?>
+--EXPECTF--
+Warning: strpos(): Empty needle in %sbug63943.php on line %d