diff --git a/libc/bionic/netinet_in.cpp b/libc/bionic/netinet_in.cpp
index dfa5d8d..2a7090a 100644
--- a/libc/bionic/netinet_in.cpp
+++ b/libc/bionic/netinet_in.cpp
@@ -29,6 +29,7 @@
 #include <netinet/in.h>
 
 #include <errno.h>
+#include <netdb.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <string.h>