diff --git a/pkg/tinydtls/Makefile.dep b/pkg/tinydtls/Makefile.dep
index c567f46953..7e41357280 100644
--- a/pkg/tinydtls/Makefile.dep
+++ b/pkg/tinydtls/Makefile.dep
@@ -5,6 +5,7 @@ USEMODULE += hashes
 USEMODULE += random
 USEMODULE += tinydtls_aes
 USEMODULE += tinydtls_ecc
+USEMODULE += xtimer
 
 # TinyDTLS only has support for 32-bit architectures ATM
 FEATURES_REQUIRED += arch_32bit
diff --git a/pkg/tinydtls/contrib/sock_dtls.c b/pkg/tinydtls/contrib/sock_dtls.c
index 2705f0a106..41fc7f66e4 100644
--- a/pkg/tinydtls/contrib/sock_dtls.c
+++ b/pkg/tinydtls/contrib/sock_dtls.c
@@ -22,6 +22,7 @@
 #include "log.h"
 #include "net/sock/dtls.h"
 #include "net/credman.h"
+#include "xtimer.h"
 
 #if SOCK_HAS_ASYNC
 #include "net/sock/async.h"