diff --git a/config.m4 b/config.m4
index d7cda0b4474..dfdbd0f2e13 100644
--- a/config.m4
+++ b/config.m4
@@ -8,6 +8,7 @@ if test "$PHP_GRPC" != "no"; then
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/include)
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/src/php/ext/grpc)
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/boringssl/include)
+  PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/address_sorting/include)
 
   LIBS="-lpthread $LIBS"
 
diff --git a/templates/config.m4.template b/templates/config.m4.template
index 9877e4be186..cc19d98375f 100644
--- a/templates/config.m4.template
+++ b/templates/config.m4.template
@@ -10,6 +10,7 @@
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/include)
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/src/php/ext/grpc)
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/boringssl/include)
+    PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/address_sorting/include)
 
     LIBS="-lpthread $LIBS"