diff --git a/src/internal/slibtool_dprintf_impl.c b/src/internal/slibtool_dprintf_impl.c
index f63a026..91641cd 100644
--- a/src/internal/slibtool_dprintf_impl.c
+++ b/src/internal/slibtool_dprintf_impl.c
@@ -10,6 +10,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "slibtool_dprintf_impl.h"
+
 int slbt_dprintf(int fd, const char * fmt, ...)
 {
 	int	ret;