diff --git a/src/test/test-sizeof.c b/src/test/test-sizeof.c
index 7fc16a62b6..1020e0cb31 100644
--- a/src/test/test-sizeof.c
+++ b/src/test/test-sizeof.c
@@ -3,6 +3,8 @@
 #include <sched.h>
 #include <stdio.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 
 #define __STDC_WANT_IEC_60559_TYPES_EXT__
 #include <float.h>
@@ -65,6 +67,7 @@ int main(void) {
         info(pid_t);
         info(uid_t);
         info(gid_t);
+        info(socklen_t);
 
         info(__cpu_mask);