diff --git a/libflashrom.c b/libflashrom.c
index 1d8a9ae..0dec22e 100644
--- a/libflashrom.c
+++ b/libflashrom.c
@@ -170,6 +170,7 @@
  */
 struct flashrom_board_info *flashrom_supported_boards(void)
 {
+#if CONFIG_INTERNAL == 1
 	int boards_known_size = 0;
 	int i = 0;
 	const struct board_info *binfo = boards_known;
@@ -194,6 +195,9 @@
 	}
 
 	return supported_boards;
+#else
+	return NULL;
+#endif
 }
 
 /**
@@ -202,6 +206,7 @@
  */
 struct flashrom_chipset_info *flashrom_supported_chipsets(void)
 {
+#if CONFIG_INTERNAL == 1
 	int chipset_enables_size = 0;
 	int i = 0;
 	const struct penable *chipset = chipset_enables;
@@ -228,6 +233,9 @@
 	}
 
 	return supported_chipsets;
+#else
+	return NULL;
+#endif
 }
 
 /**