diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c
index da62448..466b6f7 100644
--- a/src/journal/journald-native.c
+++ b/src/journal/journald-native.c
@@ -293,7 +293,7 @@ finish:
 
 void server_process_native_message(
                 Server *s,
-                const void *buffer, size_t buffer_size,
+                const char *buffer, size_t buffer_size,
                 const struct ucred *ucred,
                 const struct timeval *tv,
                 const char *label, size_t label_len) {
diff --git a/src/journal/journald-native.h b/src/journal/journald-native.h
index 7211d4f..2a33ef7 100644
--- a/src/journal/journald-native.h
+++ b/src/journal/journald-native.h
@@ -5,7 +5,7 @@
 
 void server_process_native_message(
                 Server *s,
-                const void *buffer,
+                const char *buffer,
                 size_t buffer_size,
                 const struct ucred *ucred,
                 const struct timeval *tv,