diff --git a/include/field_weather.h b/include/field_weather.h
index eda06834bc..9805dc491d 100644
--- a/include/field_weather.h
+++ b/include/field_weather.h
@@ -170,7 +170,7 @@ void SetWeatherScreenFadeOut(void);
 void SetWeatherPalStateIdle(void);
 void PreservePaletteInWeather(u8 preservedPalIndex);
 void ResetPreservedPalettesInWeather(void);
-bool8 IsWeatherAlphaBlend(void);
+bool32 IsWeatherAlphaBlend(void);
 
 // field_weather_effect.c
 void Clouds_InitVars(void);
diff --git a/include/rtc.h b/include/rtc.h
index 2645458f68..bf8ff9aa93 100644
--- a/include/rtc.h
+++ b/include/rtc.h
@@ -118,6 +118,6 @@ void RtcCalcLocalTimeOffset(s32 days, s32 hours, s32 minutes, s32 seconds);
 void CalcTimeDifference(struct Time *result, struct Time *t1, struct Time *t2);
 u32 RtcGetMinuteCount(void);
 u32 RtcGetLocalDayCount(void);
-void FormatDecimalTimeWithoutSeconds(u8 *dest, s8 hour, s8 minute, bool8 is24Hour);
+void FormatDecimalTimeWithoutSeconds(u8 *dest, s8 hour, s8 minute, bool32 is24Hour);
 
 #endif // GUARD_RTC_UTIL_H
diff --git a/src/field_weather.c b/src/field_weather.c
index d1a0b531eb..152f3efe63 100644
--- a/src/field_weather.c
+++ b/src/field_weather.c
@@ -1105,10 +1105,10 @@ void ResetPreservedPalettesInWeather(void)
     sPaletteColorMapTypes = sBasePaletteColorMapTypes;
 }
 
-bool8 IsWeatherAlphaBlend(void)
+bool32 IsWeatherAlphaBlend(void)
 {
-    return (gWeatherPtr->currWeather == WEATHER_FOG_HORIZONTAL) || 
-           (gWeatherPtr->currWeather == WEATHER_FOG_DIAGONAL)   ||
-           (gWeatherPtr->currWeather == WEATHER_UNDERWATER_BUBBLES) ||
-           (gWeatherPtr->currWeather == WEATHER_UNDERWATER);
+    return (gWeatherPtr->currWeather == WEATHER_FOG_HORIZONTAL
+         || gWeatherPtr->currWeather == WEATHER_FOG_DIAGONAL
+         || gWeatherPtr->currWeather == WEATHER_UNDERWATER_BUBBLES
+         || gWeatherPtr->currWeather == WEATHER_UNDERWATER);
 }
diff --git a/src/rtc.c b/src/rtc.c
index c77d7dd9fd..a53d5e1fd8 100644
--- a/src/rtc.c
+++ b/src/rtc.c
@@ -366,7 +366,7 @@ u32 RtcGetLocalDayCount(void)
     return RtcGetDayCount(&sRtc);
 }
 
-void FormatDecimalTimeWithoutSeconds(u8 *txtPtr, s8 hour, s8 minute, bool8 is24Hour)
+void FormatDecimalTimeWithoutSeconds(u8 *txtPtr, s8 hour, s8 minute, bool32 is24Hour)
 {
     if (is24Hour)
     {