diff --git a/src/main.c b/src/main.c
index c51e0eb..00b9449 100644
--- a/src/main.c
+++ b/src/main.c
@@ -89,7 +89,8 @@ void print_wifi_version(void) {
 #define BIT_SYS_SYSPLL_CK83P33M_EN (0x00000001 << 8)
 /* reg_ps_en Enable phase shift */
 #define BIT_SYS_SYSPLL_CK_PS_EN (0x00000001 << 7)
-/* "decide clock phase when reg_ps_enb = 1000/001��/111: phase 0, 45��315 */
+/* Clock phase selection when reg_ps_enb:
+   000/001.../111 corresponds to phases: 0°, 45°...315° */
 #define BIT_SYS_SYSPLL_CK_PS_SEL (0x00000007 << 4)
 
 /* REG_SYS_EFUSE_SYSCFG2 */