diff --git a/include/functions.h b/include/functions.h
index 9dffcf2dab..fb21d162ab 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -33,9 +33,6 @@ void Yaz0_DecompressImpl(u8* src, u8* dst);
 void Yaz0_Decompress(uintptr_t romStart, u8* dst, size_t size);
 void Locale_Init(void);
 void Locale_ResetRegion(void);
-u32 func_80001F48(void);
-u32 func_80001F8C(void);
-u32 Locale_IsRegionNative(void);
 #if OOT_DEBUG
 void isPrintfInit(void);
 #endif
@@ -52,16 +49,12 @@ void StackCheck_Cleanup(StackEntry* entry);
 u32 StackCheck_GetState(StackEntry* entry);
 u32 StackCheck_CheckAll(void);
 u32 StackCheck_Check(StackEntry* entry);
-f32 LogUtils_CheckFloatRange(const char* exp, s32 line, const char* valueName, f32 value, const char* minName, f32 min,
-                             const char* maxName, f32 max);
-s32 LogUtils_CheckIntRange(const char* exp, s32 line, const char* valueName, s32 value, const char* minName, s32 min,
-                           const char* maxName, s32 max);
+#if OOT_DEBUG
 void LogUtils_LogHexDump(void* ptr, s32 size0);
-void LogUtils_LogPointer(s32 value, u32 max, void* ptr, const char* name, const char* file, s32 line);
-void LogUtils_CheckBoundary(const char* name, s32 value, s32 unk, const char* file, s32 line);
 void LogUtils_CheckNullPointer(const char* exp, void* ptr, const char* file, s32 line);
 void LogUtils_CheckValidPointer(const char* exp, void* ptr, const char* file, s32 line);
 void LogUtils_LogThreadId(const char* name, s32 line);
+#endif
 void LogUtils_HungupThread(const char* name, s32 line);
 void LogUtils_ResetHungup(void);
 void __osPiCreateAccessQueue(void);
diff --git a/src/boot/logutils.c b/src/boot/logutils.c
index 5b3d024b23..1015984820 100644
--- a/src/boot/logutils.c
+++ b/src/boot/logutils.c
@@ -1,6 +1,7 @@
 #include "global.h"
 #include "terminal.h"
 
+#if OOT_DEBUG
 f32 LogUtils_CheckFloatRange(const char* exp, s32 line, const char* valueName, f32 value, const char* minName, f32 min,
                              const char* maxName, f32 max) {
     if (value < min || max < value) {
@@ -99,9 +100,12 @@ void LogUtils_CheckValidPointer(const char* exp, void* ptr, const char* file, s3
 void LogUtils_LogThreadId(const char* name, s32 line) {
     PRINTF("<%d %s %d>", osGetThreadId(NULL), name, line);
 }
+#endif
 
 void LogUtils_HungupThread(const char* name, s32 line) {
-    PRINTF("*** HungUp in thread %d, [%s:%d] ***\n", osGetThreadId(NULL), name, line);
+    OSId threadId = osGetThreadId(NULL);
+
+    PRINTF("*** HungUp in thread %d, [%s:%d] ***\n", threadId, name, line);
     Fault_AddHungupAndCrash(name, line);
 }
 
diff --git a/src/boot/z_locale.c b/src/boot/z_locale.c
index 3be3e0e050..abff2ba77e 100644
--- a/src/boot/z_locale.c
+++ b/src/boot/z_locale.c
@@ -33,6 +33,7 @@ void Locale_ResetRegion(void) {
     gCurrentRegion = REGION_NULL;
 }
 
+#if OOT_DEBUG
 u32 func_80001F48(void) {
     if (gCurrentRegion == REGION_NATIVE) {
         return 0;
@@ -61,3 +62,4 @@ u32 func_80001F8C(void) {
 u32 Locale_IsRegionNative(void) {
     return gCurrentRegion == REGION_NATIVE;
 }
+#endif