1 files changed, 3 insertions, 0 deletions

diff --git a/regress/dev.c b/regress/dev.c
index 39b3584..84a45cc 100644
--- a/regress/dev.c
+++ b/regress/dev.c
@@ -6,6 +6,7 @@
 
 #include <assert.h>
 #include <fido.h>
+#include <string.h>
 
 #define FAKE_DEV_HANDLE ((void *)0xdeadbeef)
 #define REPORT_LEN      (64 + 1)
@@ -53,6 +54,8 @@ open_iff_ok(void)
         fido_dev_t      *dev = NULL;
         fido_dev_io_t    io;
 
+        memset(&io, 0, sizeof(io));
+
         io.open = dummy_open;
         io.close = dummy_close;
         io.read = dummy_read;