diff --git a/src/H5MF.c b/src/H5MF.c
index aa65db222b0..5e61751e61f 100644
--- a/src/H5MF.c
+++ b/src/H5MF.c
@@ -2645,6 +2645,10 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hbool_t *fsm_settled)
     HDassert(f->shared);
     HDassert(fsm_settled);
 
+    /* Initialize structs */
+    HDmemset(&fsinfo, 0, sizeof(fsinfo));
+    HDmemset(&fs_stat, 0, sizeof(fs_stat));
+
     /*
      * Only need to settle things if we are persisting free space and
      * the private property in f->shared->null_fsm_addr is not enabled.
diff --git a/test/dsets.c b/test/dsets.c
index d5c11be414a..ae917cc986f 100644
--- a/test/dsets.c
+++ b/test/dsets.c
@@ -11334,6 +11334,9 @@ test_bt2_hdr_fd(const char *env_h5_driver, hid_t fapl)
 
     TESTING("Version 2 B-tree chunk index header flush dependencies handled correctly");
 
+    /* Initialize struct */
+    HDmemset(&info, 0, sizeof(info));
+
     /* Skip this test if SWMR I/O is not supported for the VFD specified
      * by the environment variable.
      */