diff --git a/src/io_backend/io_backend.c b/src/io_backend/io_backend.c
index c6cebdc..eef080a 100644
--- a/src/io_backend/io_backend.c
+++ b/src/io_backend/io_backend.c
@@ -125,7 +125,7 @@ int iob_config_from_args(struct args_options *args, struct iob_context *ctx)
         break;
 
     default:
-        return -1;
+        return IOB_ERROR_GENERIC;
     }
     return 0;
-}
\ No newline at end of file
+}
diff --git a/src/io_backend/io_backend.h b/src/io_backend/io_backend.h
index 39e6d2e..7b9e9b2 100644
--- a/src/io_backend/io_backend.h
+++ b/src/io_backend/io_backend.h
@@ -2,6 +2,7 @@
 #define IO_BACKEND_H
 
 #include <sys/types.h>
+#include "utils/args/args.h"
 
 // Error codes
 #define IOB_ERROR_GENERIC -1