diff --git a/targets/TARGET_TOSHIBA/TARGET_TMPM4G9/Periph_Driver/src/txz_adc_ch.c b/targets/TARGET_TOSHIBA/TARGET_TMPM4G9/Periph_Driver/src/txz_adc_ch.c
index 40e6298f56..3e83ba6358 100644
--- a/targets/TARGET_TOSHIBA/TARGET_TMPM4G9/Periph_Driver/src/txz_adc_ch.c
+++ b/targets/TARGET_TOSHIBA/TARGET_TMPM4G9/Periph_Driver/src/txz_adc_ch.c
@@ -43,7 +43,7 @@
 #include "txz_adc_include.h"
 #include "txz_adc_ch.h"
 
-#if defined(__ADC_CH_H)
+#if defined(__TXZ_ADC_CH_H)
 /**
  *  @addtogroup Periph_Driver Peripheral Driver
  *  @{