1 files changed, 2 insertions, 1 deletions
diff --git a/test/fillval.c b/test/fillval.c
index 47cd53a..5c20e14 100644
--- a/test/fillval.c
+++ b/test/fillval.c
@@ -758,7 +758,8 @@ test_rdwr_cases(hid_t file, hid_t dcpl, const char *dname, void *_fillval,
     int        fillval=(-1), val_rd, should_be;
     int        i, j, *buf=NULL, odd;
     unsigned    u;
-    comp_datatype       rd_c, fill_c, should_be_c;
+    comp_datatype       rd_c, fill_c = {.a = 0, .x = 0, .y = 0, .z = 0},
+                        should_be_c;
     comp_datatype    *buf_c=NULL;
     H5D_space_status_t  allocation;