Generate build files
diff --git a/config.m4 b/config.m4
index a9b51ca..01a3acd 100644
--- a/config.m4
+++ b/config.m4
@@ -58,9 +58,6 @@
     src/core/lib/support/log_windows.c \
     src/core/lib/support/mpscq.c \
     src/core/lib/support/murmur_hash.c \
-    src/core/lib/support/percent_encoding.c \
-    src/core/lib/support/slice.c \
-    src/core/lib/support/slice_buffer.c \
     src/core/lib/support/stack_lockfree.c \
     src/core/lib/support/string.c \
     src/core/lib/support/string_posix.c \
@@ -151,6 +148,10 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/slice/percent_encoding.c \
+    src/core/lib/slice/slice.c \
+    src/core/lib/slice/slice_buffer.c \
+    src/core/lib/slice/slice_string_helpers.c \
     src/core/lib/surface/alarm.c \
     src/core/lib/surface/api_trace.c \
     src/core/lib/surface/byte_buffer.c \
@@ -621,6 +622,7 @@
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/security/credentials/ssl)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/security/transport)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/security/util)
+  PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/slice)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/support)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/surface)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/transport)