diff --git a/src/internal/Esp32_i2s.c b/src/internal/Esp32_i2s.c
index 6f6b730..652ddfa 100644
--- a/src/internal/Esp32_i2s.c
+++ b/src/internal/Esp32_i2s.c
@@ -46,7 +46,7 @@
 #include "Esp32_i2s.h"
 #include "esp32-hal.h"
 
-#if ESP_IDF_VERSION_MAJOR<4
+#if ESP_IDF_VERSION_MAJOR<=4
 #define I2S_BASE_CLK (160000000L)
 #endif