diff --git a/DESCRIPTION b/DESCRIPTION
index ee69259..ec2b534 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: qoi
 Type: Package
 Title: Read and Write QOI Images
-Date: 2022-04-20
-Version: 0.0.3
+Date: 2023-02-07
+Version: 0.0.4
 Author: Johannes Friedrich [aut, trl, cre],
         Dominic Szablewski [cph] (C library 'qoi')
 Authors@R: c(person("Johannes", "Friedrich", role = c("aut", "trl","cre"), email = c("Johannes.Friedrich@posteo.de")),
@@ -14,7 +14,7 @@ Description: The new QOI file format offers a very simple but efficient image co
 License: GPL (>= 3)
 Encoding: UTF-8
 NeedsCompilation: yes
-RoxygenNote: 7.1.2
+RoxygenNote: 7.2.3
 Depends: 
     R (>= 2.10)
 LazyData: true
diff --git a/src/init.c b/src/init.c
index b8c681d..d58f108 100644
--- a/src/init.c
+++ b/src/init.c
@@ -6,8 +6,8 @@
 // Many thanks to coolbutuseless for the great tutorials!
 // https://github.com/coolbutuseless/simplecall
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-extern SEXP qoiRead_();
-extern SEXP qoiWrite_();
+extern SEXP qoiRead_(SEXP);
+extern SEXP qoiWrite_(SEXP, SEXP);
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 // .C      R_CMethodDef