diff --git a/reactos/dll/cpl/intl_new/currency.c b/reactos/dll/cpl/intl_new/currency.c
index ab3e68017c6..670b05cdfd0 100644
--- a/reactos/dll/cpl/intl_new/currency.c
+++ b/reactos/dll/cpl/intl_new/currency.c
@@ -715,7 +715,7 @@ CurrencyOptsSetProc(HWND hwndDlg,
                 InitNegCurrencySumCB(hwndDlg);
 
                 /* FIXME: */
-                _sleep(15);
+                Sleep(15);
                 UpdateCurrencyLocaleSamples(hwndDlg, LOCALE_USER_DEFAULT);
             }
         }
diff --git a/reactos/dll/cpl/intl_new/date.c b/reactos/dll/cpl/intl_new/date.c
index 83e7eb50506..66ad93af28f 100644
--- a/reactos/dll/cpl/intl_new/date.c
+++ b/reactos/dll/cpl/intl_new/date.c
@@ -596,7 +596,7 @@ DateOptsSetProc(HWND hwndDlg,
                 if(!SetLongDateFormat(hwndDlg)) break;
                 InitShortDateCB(hwndDlg);
                 /* FIXME: */
-                _sleep(15);
+                Sleep(15);
                 UpdateDateLocaleSamples(hwndDlg, LOCALE_USER_DEFAULT);
             }
         }
diff --git a/reactos/dll/cpl/intl_new/nums.c b/reactos/dll/cpl/intl_new/nums.c
index 94516979ad2..c19db00f0fb 100644
--- a/reactos/dll/cpl/intl_new/nums.c
+++ b/reactos/dll/cpl/intl_new/nums.c
@@ -837,7 +837,7 @@ NumsOptsSetProc(HWND hwndDlg,
                 InitNegNumFmtCB(hwndDlg);
 
                 /* FIXME: */
-                _sleep(15);
+                Sleep(15);
                 /* Update sum format samples */
                 UpdateNumSamples(hwndDlg, LOCALE_USER_DEFAULT);
             }
diff --git a/reactos/dll/cpl/intl_new/time.c b/reactos/dll/cpl/intl_new/time.c
index c07505d339d..84b4c75c9f2 100644
--- a/reactos/dll/cpl/intl_new/time.c
+++ b/reactos/dll/cpl/intl_new/time.c
@@ -523,7 +523,7 @@ TimeOptsSetProc(HWND hwndDlg,
                 
 
                 /* FIXME: */
-                _sleep(15);
+                Sleep(15);
                 UpdateTimeLocaleSamples(hwndDlg, LOCALE_USER_DEFAULT);
             }
         }