diff --git a/core/libs/prx/libc/src/Formatting.cpp b/core/libs/prx/libc/src/Formatting.cpp
index a67a0b877e..1e908eee91 100644
--- a/core/libs/prx/libc/src/Formatting.cpp
+++ b/core/libs/prx/libc/src/Formatting.cpp
@@ -714,6 +714,7 @@ int APS5_VABI snprintf_s_nid_postfix(char* buffer, size_t size, const char* form
 }
 
 int APS5_VABI printf_s_nid_postfix(const char* format, ...) {
+    if (!_Stdout_nid_postfix.IsOpen()) { errno = 9; return -1; }
     __builtin_sysv_va_list args;
     __builtin_sysv_va_start(args, format);
     const int result = LibcDetail::PrintWindows(format, args);
@@ -754,6 +755,7 @@ int APS5_VABI snprintf_s_nid_postfix(char* buffer, size_t size, const char* form
 }
 
 int APS5_VABI printf_s_nid_postfix(const char* format, ...) {
+    if (!_Stdout_nid_postfix.IsOpen()) { errno = 9; return -1; }
     std::va_list args;
     va_start(args, format);
     const int result = RequiresGuestFormatting(format) ? LibcDetail::PrintWindows(format, args) : std::vfprintf(GuestStandardOutputFile_nid_no_patch(), format, args);
diff --git a/core/libs/tests/GuestStandardStreams.cpp b/core/libs/tests/GuestStandardStreams.cpp
index 3b0dd20541..df46b1c26f 100644
--- a/core/libs/tests/GuestStandardStreams.cpp
+++ b/core/libs/tests/GuestStandardStreams.cpp
@@ -575,6 +575,10 @@ static int CheckClosedStandardOutput() {
     Require(printf_nid_postfix("%d", 1) == -1 && *__error_nid_postfix() == 9);
     Require(puts_nid_postfix("text") == -1 && *__error_nid_postfix() == 9);
     Require(PrintStandard("%d", 1) == -1 && *__error_nid_postfix() == 9);
+    *__error_nid_postfix() = 0;
+    Require(printf_s_nid_postfix("%d", 1) == -1 && *__error_nid_postfix() == 9);
+    *__error_nid_postfix() = 0;
+    Require(printf_s_nid_postfix("%p", nullptr) == -1 && *__error_nid_postfix() == 9);
     Require(fputs_nid_postfix("text", __stdoutp_nid_postfix) == -1 && *__error_nid_postfix() == 9);
     *__error_nid_postfix() = 0;
     Require(wprintf_nid_postfix(u"%d", 1) == -1 && *__error_nid_postfix() == 9);