diff --git a/src/ior.c b/src/ior.c
index 55733d5..0daddff 100755
--- a/src/ior.c
+++ b/src/ior.c
@@ -1293,6 +1293,17 @@ static void TestIoSys(IOR_test_t *test)
 
         /* loop over test iterations */
         uint64_t params_saved_wearout = params->stoneWallingWearOutIterations;
+
+        /* Check if the file exists and warn users */
+        if( params->hints.filePerProc || rank == 0){
+          struct stat sb;
+          GetTestFileName(testFileName, params);
+          int ret = backend->stat(testFileName, & sb, params->backend_options);
+          if(ret == 0) {
+            EWARNF("The file \"%s\" exists already and will be overwritten", testFileName);
+          }
+        }
+
         for (rep = 0; rep < params->repetitions; rep++) {
                 /* Get iteration start time in seconds in task 0 and broadcast to
                    all tasks */