diff --git a/UPGRADING b/UPGRADING
index ddda3d4d66d..9350f2899cd 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -163,6 +163,10 @@ Standard:
 3. Changes in SAPI modules
 ========================================
 
+phpdbg:
+  . The unused constants PHPDBG_FILE, PHPDBG_METHOD, PHPDBG_LINENO and
+    PHPDBG_FUNC have been removed.
+
 ========================================
 4. Deprecated Functionality
 ========================================
diff --git a/sapi/phpdbg/phpdbg.c b/sapi/phpdbg/phpdbg.c
index a1fdc0cfe15..f51ea0001c5 100644
--- a/sapi/phpdbg/phpdbg.c
+++ b/sapi/phpdbg/phpdbg.c
@@ -210,11 +210,6 @@ static PHP_MINIT_FUNCTION(phpdbg) /* {{{ */
 
 	REGISTER_STRINGL_CONSTANT("PHPDBG_VERSION", PHPDBG_VERSION, sizeof(PHPDBG_VERSION)-1, CONST_CS|CONST_PERSISTENT);
 
-	REGISTER_LONG_CONSTANT("PHPDBG_FILE",   FILE_PARAM, CONST_CS|CONST_PERSISTENT);
-	REGISTER_LONG_CONSTANT("PHPDBG_METHOD", METHOD_PARAM, CONST_CS|CONST_PERSISTENT);
-	REGISTER_LONG_CONSTANT("PHPDBG_LINENO", NUMERIC_PARAM, CONST_CS|CONST_PERSISTENT);
-	REGISTER_LONG_CONSTANT("PHPDBG_FUNC",   STR_PARAM, CONST_CS|CONST_PERSISTENT);
-
 	REGISTER_LONG_CONSTANT("PHPDBG_COLOR_PROMPT", PHPDBG_COLOR_PROMPT, CONST_CS|CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHPDBG_COLOR_NOTICE", PHPDBG_COLOR_NOTICE, CONST_CS|CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHPDBG_COLOR_ERROR",  PHPDBG_COLOR_ERROR, CONST_CS|CONST_PERSISTENT);