diff --git a/src/completion.h b/src/completion.h
index ba22e30..cd5a02e 100644
--- a/src/completion.h
+++ b/src/completion.h
@@ -1,7 +1,7 @@
 #ifndef _COMPLETION_SESSION_H_
 #define _COMPLETION_SESSION_H_
 
-
+#include <stdio.h>
 #include <clang-c/Index.h>