diff --git a/fsw/src/cf_cfdp_r.c b/fsw/src/cf_cfdp_r.c
index 644473e1..297ace5a 100644
--- a/fsw/src/cf_cfdp_r.c
+++ b/fsw/src/cf_cfdp_r.c
@@ -613,7 +613,8 @@ void CF_CFDP_R_Init(CF_Transaction_t *t)
         CF_CFDP_ArmAckTimer(t);
     }
 
-    ret = CF_WrappedOpenCreate(&t->fd, t->history->fnames.dst_filename, OS_FILE_FLAG_CREATE, OS_READ_WRITE);
+    ret = CF_WrappedOpenCreate(&t->fd, t->history->fnames.dst_filename, OS_FILE_FLAG_CREATE | OS_FILE_FLAG_TRUNCATE,
+                               OS_READ_WRITE);
     if (ret < 0)
     {
         CFE_EVS_SendEvent(CF_EID_ERR_CFDP_R_CREAT, CFE_EVS_EventType_ERROR,
diff --git a/fsw/src/cf_cmd.c b/fsw/src/cf_cmd.c
index 3c90f22f..f81f5b71 100644
--- a/fsw/src/cf_cmd.c
+++ b/fsw/src/cf_cmd.c
@@ -743,7 +743,7 @@ void CF_CmdWriteQueue(CFE_SB_Buffer_t *msg)
 
     /* PTFO: queues can be large. may want to split this work up across the state machine and take several wakeups to
      * complete */
-    ret = CF_WrappedOpenCreate(&fd, wq->filename, OS_FILE_FLAG_CREATE, OS_WRITE_ONLY);
+    ret = CF_WrappedOpenCreate(&fd, wq->filename, OS_FILE_FLAG_CREATE | OS_FILE_FLAG_TRUNCATE, OS_WRITE_ONLY);
     if (ret < 0)
     {
         CFE_EVS_SendEvent(CF_EID_ERR_CMD_WQ_OPEN, CFE_EVS_EventType_ERROR, "CF: write queue failed to open file %s",