diff --git a/src/parse_options.c b/src/parse_options.c
index af30c36..47f9920 100755
--- a/src/parse_options.c
+++ b/src/parse_options.c
@@ -477,7 +477,7 @@ option_help * createGlobalOptions(IOR_param_t * params){
     {.help="  -O stoneWallingWearOut=1           -- once the stonewalling timout is over, all process finish to access the amount of data", .arg = OPTION_OPTIONAL_ARGUMENT},
     {.help="  -O stoneWallingWearOutIterations=N -- stop after processing this number of iterations, needed for reading data back written with stoneWallingWearOut", .arg = OPTION_OPTIONAL_ARGUMENT},
     {.help="  -O stoneWallingStatusFile=FILE     -- this file keeps the number of iterations from stonewalling during write and allows to use them for read", .arg = OPTION_OPTIONAL_ARGUMENT},
-    {'e', NULL,        "fsync -- perform sync operation after each block write", OPTION_FLAG, 'd', & params->fsync},
+    {'e', NULL,        "fsync -- perform a fsync() operation at the end of each read/write phase", OPTION_FLAG, 'd', & params->fsync},
     {'E', NULL,        "useExistingTestFile -- do not remove test file before write access", OPTION_FLAG, 'd', & params->useExistingTestFile},
     {'f', NULL,        "scriptFile -- test script name", OPTION_OPTIONAL_ARGUMENT, 's', & params->testscripts},
     {'F', NULL,        "filePerProc -- file-per-process", OPTION_FLAG, 'd', & params->filePerProc},