diff --git a/libfdt/fdt.c b/libfdt/fdt.c
index 212b838..1ee67ad 100644
--- a/libfdt/fdt.c
+++ b/libfdt/fdt.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -83,3 +86,5 @@
 	memmove(buf, fdt, fdt_totalsize(fdt));
 	return 0;
 }
+
+#endif /* CONFIG_OF_LIBFDT */
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index 4e2c325..defe59c 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -400,3 +403,6 @@
 	}
 	return 0;
 }
+
+#endif /* CONFIG_OF_LIBFDT */
+
diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index aaafc53..693bfe4 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -291,3 +294,5 @@
 	fdt_set_header(fdt, totalsize, _blob_data_size(fdt));
 	return 0;
 }
+
+#endif /* CONFIG_OF_LIBFDT */
diff --git a/libfdt/fdt_strerror.c b/libfdt/fdt_strerror.c
index 7f231ce..b49c952 100644
--- a/libfdt/fdt_strerror.c
+++ b/libfdt/fdt_strerror.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -62,3 +65,5 @@
 
 	return "<unknown error>";
 }
+
+#endif /* CONFIG_OF_LIBFDT */
diff --git a/libfdt/fdt_sw.c b/libfdt/fdt_sw.c
index 672f4dd..c7eea8f 100644
--- a/libfdt/fdt_sw.c
+++ b/libfdt/fdt_sw.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -224,3 +227,5 @@
 	fdt_set_header(fdt, magic, FDT_MAGIC);
 	return 0;
 }
+
+#endif /* CONFIG_OF_LIBFDT */
diff --git a/libfdt/fdt_wip.c b/libfdt/fdt_wip.c
index 2d2ed37..2d39aab 100644
--- a/libfdt/fdt_wip.c
+++ b/libfdt/fdt_wip.c
@@ -16,6 +16,9 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "config.h"
+#if CONFIG_OF_LIBFDT
+
 #include "libfdt_env.h"
 
 #include <fdt.h>
@@ -135,3 +138,5 @@
 
 	return 0;
 }
+
+#endif /* CONFIG_OF_LIBFDT */