1 files changed, 3 insertions, 3 deletions
diff --git a/Modules/_ctypes/_ctypes_test.c b/Modules/_ctypes/_ctypes_test.c
index 2255e57339..620a3c6aea 100644
--- a/Modules/_ctypes/_ctypes_test.c
+++ b/Modules/_ctypes/_ctypes_test.c
@@ -63,7 +63,7 @@ typedef struct {
 } TestReg;
 
 
-EXPORT(TestReg) last_tfrsuv_arg;
+EXPORT(TestReg) last_tfrsuv_arg = {0};
 
 
 EXPORT(void)
@@ -410,8 +410,8 @@ EXPORT(void) _py_func(void)
 {
 }
 
-EXPORT(long long) last_tf_arg_s;
-EXPORT(unsigned long long) last_tf_arg_u;
+EXPORT(long long) last_tf_arg_s = 0;
+EXPORT(unsigned long long) last_tf_arg_u = 0;
 
 struct BITS {
     int A: 1, B:2, C:3, D:4, E: 5, F: 6, G: 7, H: 8, I: 9;