diff --git a/libc/netbsd/gethnamaddr.c b/libc/netbsd/gethnamaddr.c
index 3ebe53e..728801f 100644
--- a/libc/netbsd/gethnamaddr.c
+++ b/libc/netbsd/gethnamaddr.c
@@ -67,6 +67,7 @@
 #include <netdb.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <strings.h>
 #include <syslog.h>
 
 #ifndef LOG_AUTH
diff --git a/libc/netbsd/net/getaddrinfo.c b/libc/netbsd/net/getaddrinfo.c
index edb4f70..cf05036 100644
--- a/libc/netbsd/net/getaddrinfo.c
+++ b/libc/netbsd/net/getaddrinfo.c
@@ -97,6 +97,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 
 #include <syslog.h>
diff --git a/libc/netbsd/net/nsdispatch.c b/libc/netbsd/net/nsdispatch.c
index fa99366..15282be 100644
--- a/libc/netbsd/net/nsdispatch.c
+++ b/libc/netbsd/net/nsdispatch.c
@@ -84,6 +84,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 
 static nss_method
diff --git a/libc/netbsd/resolv/res_debug.c b/libc/netbsd/resolv/res_debug.c
index 721e015..46e583b 100644
--- a/libc/netbsd/resolv/res_debug.c
+++ b/libc/netbsd/resolv/res_debug.c
@@ -123,6 +123,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <time.h>