diff --git a/fiv-io.h b/fiv-io.h
index 066770c..3841ffa 100644
--- a/fiv-io.h
+++ b/fiv-io.h
@@ -20,6 +20,7 @@
 #include <cairo.h>
 #include <gio/gio.h>
 #include <glib.h>
+#include <webp/encode.h>  // WebPConfig
 
 // --- Colour management -------------------------------------------------------
 
@@ -103,8 +104,6 @@ GPtrArray *fiv_io_model_get_subdirectories(FivIoModel *self);
 
 // --- Export ------------------------------------------------------------------
 
-typedef struct WebPConfig WebPConfig;
-
 /// Encodes a Cairo surface as a WebP bitstream, following the configuration.
 /// The result needs to be freed using WebPFree/WebPDataClear().
 unsigned char *fiv_io_encode_webp(