diff --git a/src/b64.h b/b64.h
similarity index 100%
rename from src/b64.h
rename to b64.h
diff --git a/src/components.h b/components.h
similarity index 100%
rename from src/components.h
rename to components.h
diff --git a/config.m4 b/config.m4
index c0d1cb7f8e71caf1ac7b1ca133f6bb4c3c1a6d89..fd05022f40d087ae06109764714a9cdce47f0439 100644
--- a/config.m4
+++ b/config.m4
@@ -2,10 +2,9 @@ PHP_ARG_ENABLE(skywalking, whether to enable skywalking support,
 [  --enable-skywalking           Enable skywalking support])
 
 if test "$PHP_SKYWALKING" != "no"; then
-  PHP_ADD_INCLUDE("src")
   PHP_NEW_EXTENSION(skywalking, \
       skywalking.c \
-      src/decode.c \
-      src/encode.c \
+      decode.c \
+      encode.c \
   , $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
 fi
diff --git a/src/decode.c b/decode.c
similarity index 100%
rename from src/decode.c
rename to decode.c
diff --git a/src/encode.c b/encode.c
similarity index 100%
rename from src/encode.c
rename to encode.c
diff --git a/skywalking.c b/skywalking.c
index f34b247a58a2b96b6f6c02847349d6632997158c..ffbe89e2beab022ddbd56596f68df4c4f9cd7588 100644
--- a/skywalking.c
+++ b/skywalking.c
@@ -30,7 +30,7 @@
 #include "php_ini.h"
 #include "ext/standard/info.h"
 #include "ext/standard/php_string.h"
-#include "src/components.h"
+#include "components.h"
 #include "php_skywalking.h"
 #include "ext/standard/url.h" /* for php_url */
 #include "ext/standard/php_var.h"