diff --git a/sapi/phpdbg/config.m4 b/sapi/phpdbg/config.m4
index a2d37633f7472..55f8fa3a8aa02 100644
--- a/sapi/phpdbg/config.m4
+++ b/sapi/phpdbg/config.m4
@@ -64,7 +64,7 @@ if test "$PHP_PHPDBG" != "no"; then
 
   PHP_ADD_MAKEFILE_FRAGMENT([$abs_srcdir/sapi/phpdbg/Makefile.frag],
     [$abs_srcdir/sapi/phpdbg],
-    [$abs_builddir/sapi/phpdbg])
+    [sapi/phpdbg])
   PHP_SELECT_SAPI([phpdbg],
     [program],
     m4_normalize([