diff --git a/include/packets/GameInf.h b/include/packets/GameInf.h
index 0665bc8..34c5793 100644
--- a/include/packets/GameInf.h
+++ b/include/packets/GameInf.h
@@ -5,7 +5,7 @@
 
 struct PACKED GameInf : Packet {
     GameInf() : Packet() {this->mType = PacketType::GAMEINF; mPacketSize = sizeof(GameInf) - sizeof(Packet);};
-    bool4 is2D = false;
+    bool1 is2D = false;
     u8 scenarioNo = -1;
     char stageName[0x40] = {};
 
diff --git a/include/packets/HackCapInf.h b/include/packets/HackCapInf.h
index c01ea60..fc92534 100644
--- a/include/packets/HackCapInf.h
+++ b/include/packets/HackCapInf.h
@@ -6,6 +6,6 @@ struct PACKED HackCapInf : Packet {
     HackCapInf() : Packet() {this->mType = PacketType::HACKCAPINF; mPacketSize = sizeof(HackCapInf) - sizeof(Packet);};
     sead::Vector3f capPos;
     sead::Quatf capQuat;
-    bool4 isCapVisible = false;
+    bool1 isCapVisible = false;
     char capAnim[PACKBUFSIZE] = {};
 };
\ No newline at end of file
diff --git a/include/packets/ShineCollect.h b/include/packets/ShineCollect.h
index 5153c57..2e6bdad 100644
--- a/include/packets/ShineCollect.h
+++ b/include/packets/ShineCollect.h
@@ -5,5 +5,5 @@
 struct PACKED ShineCollect : Packet {
     ShineCollect() : Packet() {this->mType = PacketType::SHINECOLL; mPacketSize = sizeof(ShineCollect) - sizeof(Packet);};
     int shineId = -1;
-    bool4 isGrand = false;
+    bool1 isGrand = false;
 };
\ No newline at end of file
diff --git a/include/packets/TagInf.h b/include/packets/TagInf.h
index 9adba20..bd5a64e 100644
--- a/include/packets/TagInf.h
+++ b/include/packets/TagInf.h
@@ -11,7 +11,7 @@ enum TagUpdateType : u8 {
 struct PACKED TagInf : Packet {
     TagInf() : Packet() { this->mType = PacketType::TAGINF; mPacketSize = sizeof(TagInf) - sizeof(Packet);};
     TagUpdateType updateType;
-    bool4 isIt = false;
+    bool1 isIt = false;
     u8 seconds;
     u16 minutes;
 };
\ No newline at end of file
diff --git a/include/types.h b/include/types.h
index ebcbc23..397a50c 100644
--- a/include/types.h
+++ b/include/types.h
@@ -18,7 +18,9 @@ typedef signed int          s32;
 typedef int64_t             s64;
 typedef __int128_t          s128;
 
-typedef u32                 bool4; // guaranteed to be 4 bytes, 'bool' is impl. defined
+// bool size is implementation defined, so use these where it's important
+typedef u8                  bool1;
+typedef u32                 bool4;
 
 typedef float               f32;
 typedef double              f64;