diff --git a/components/freertos/port.c b/components/freertos/port.c
index bab93aad5..3088fae45 100644
--- a/components/freertos/port.c
+++ b/components/freertos/port.c
@@ -443,6 +443,9 @@ static portMUX_TYPE extram_mux = portMUX_INITIALIZER_UNLOCKED;
 
 void uxPortCompareSetExtram(volatile uint32_t *addr, uint32_t compare, uint32_t *set) {
 	uint32_t prev;
+
+	uint32_t oldlevel = portENTER_CRITICAL_NESTED();
+
 #ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
 	vPortCPUAcquireMutexIntsDisabled(&extram_mux, portMUX_NO_TIMEOUT, __FUNCTION__, __LINE__);
 #else
@@ -458,6 +461,8 @@ void uxPortCompareSetExtram(volatile uint32_t *addr, uint32_t compare, uint32_t
 #else
 	vPortCPUReleaseMutexIntsDisabled(&extram_mux);
 #endif
+
+	portEXIT_CRITICAL_NESTED(oldlevel);
 }
 #endif //defined(CONFIG_SPIRAM)