diff --git a/src/decoder_thread.c b/src/decoder_thread.c
index 201cd5acd..bb3ef9348 100644
--- a/src/decoder_thread.c
+++ b/src/decoder_thread.c
@@ -38,6 +38,7 @@
 #include <glib.h>
 
 #include <unistd.h>
+#include <stdio.h> /* for SEEK_SET */
 
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "decoder_thread"