diff --git a/libtransmission/crypto.c b/libtransmission/crypto.c
index 95d84a589..a7208238b 100644
--- a/libtransmission/crypto.c
+++ b/libtransmission/crypto.c
@@ -16,13 +16,14 @@
 #include <stdarg.h>
 #include <netinet/in.h> /* struct in_addr */
 
-
 #include <openssl/bn.h>
 #include <openssl/dh.h>
 #include <openssl/rc4.h>
 #include <openssl/sha.h>
 
+#include <sys/types.h> /* event.h needs this */
 #include <event.h>
+
 #include "crypto.h"
 #include "utils.h"
 
diff --git a/libtransmission/peer-io.c b/libtransmission/peer-io.c
index 42af6332e..5e53c64d2 100644
--- a/libtransmission/peer-io.c
+++ b/libtransmission/peer-io.c
@@ -16,7 +16,10 @@
 #include <unistd.h>
 #include <netinet/in.h> /* struct in_addr */
 #include <arpa/inet.h> /* inet_ntoa */
+
+#include <sys/types.h> /* event.h needs this */
 #include <event.h>
+
 #include "transmission.h"
 #include "crypto.h"
 #include "net.h"