diff --git a/include/f_op/f_op_msg_mng.h b/include/f_op/f_op_msg_mng.h
index f614d5f5..0a75dfe3 100644
--- a/include/f_op/f_op_msg_mng.h
+++ b/include/f_op/f_op_msg_mng.h
@@ -158,6 +158,7 @@ JKRExpHeap* fopMsgM_createExpHeap(u32);
 fpc_ProcID fopMsgM_Create(s16, fopMsgCreateFunc, void*);
 fpc_ProcID fopMsgM_create(s16 i_procName, fopAc_ac_c* param_1 = NULL, cXyz* param_2 = NULL,
                           u32* param_3 = NULL, u32* param_4 = NULL, fopMsgCreateFunc createFunc = NULL);
+void fop_MGameTerm_create(s16, s16, s16, int, int, fopMsgCreateFunc);
 void fopMsgM_Delete(void* process);
 fopMsg_prm_class* fopMsgM_GetAppend(void* msg);
 void fopMsgM_destroyExpHeap(JKRExpHeap*);
diff --git a/src/d/d_meter.cpp b/src/d/d_meter.cpp
index 24d883de..229fb8a4 100644
--- a/src/d/d_meter.cpp
+++ b/src/d/d_meter.cpp
@@ -1654,7 +1654,7 @@ void dMeter_swimLightAnime(sub_meter_class* i_this, s16) {
 void dMeter_placeNameMove() {
     if (!dMeter_place_name) {
         if (dComIfGp_checkStageName() == 2) {
-            fopMsgM_create(PROC_PLACE_NAME, NULL, NULL, NULL, NULL, NULL);
+            fopMsgM_create(PROC_PLACE_NAME);
             dMeter_place_name = true;
         }
     } else {
diff --git a/src/d/d_s_title.cpp b/src/d/d_s_title.cpp
index 321b27aa..8f6264af 100644
--- a/src/d/d_s_title.cpp
+++ b/src/d/d_s_title.cpp
@@ -118,7 +118,7 @@ static s32 dScnTitle_Create(scene_class* i_scn) {
 #if VERSION == VERSION_PAL
     dScnTitle_c::mMp = NULL;
     if (fpcM_GetName(i_this) == PROC_ENDING_SCENE) {
-        fopMsgM_Create(PROC_MESG, 0, 0);
+        fopMsgM_Create(PROC_MESG, NULL, NULL);
     }
 #endif
 
diff --git a/src/f_op/f_op_msg_mng.cpp b/src/f_op/f_op_msg_mng.cpp
index 08bc656f..285f64a2 100644
--- a/src/f_op/f_op_msg_mng.cpp
+++ b/src/f_op/f_op_msg_mng.cpp
@@ -200,17 +200,17 @@ void createTimerAppend(int, u16, u8, u8, f32, f32, f32, f32, uint) {
 }
 
 /* 8002B1C8-8002B23C       .text fopMsgM_create__FsP10fopAc_ac_cP4cXyzPUlPUlPFPv_i */
-fpc_ProcID fopMsgM_create(s16, fopAc_ac_c*, cXyz*, u32*, u32*, int (*)(void*)) {
+fpc_ProcID fopMsgM_create(s16, fopAc_ac_c*, cXyz*, u32*, u32*, fopMsgCreateFunc) {
     /* Nonmatching */
 }
 
 /* 8002B23C-8002B2B0       .text fop_MGameTerm_create__FsssiiPFPv_i */
-void fop_MGameTerm_create(s16, s16, s16, int, int, int (*)(void*)) {
+void fop_MGameTerm_create(s16, s16, s16, int, int, fopMsgCreateFunc) {
     /* Nonmatching */
 }
 
 /* 8002B2B0-8002B324       .text fop_Timer_create__FsUcUsUcUcffffPFPv_i */
-fpc_ProcID fop_Timer_create(s16, u8, u16, u8, u8, f32, f32, f32, f32, int (*)(void*)) {
+fpc_ProcID fop_Timer_create(s16, u8, u16, u8, u8, f32, f32, f32, f32, fopMsgCreateFunc) {
     /* Nonmatching */
 }
 
@@ -490,7 +490,7 @@ void fopMsgM_outFontDraw2(J2DPicture*, J2DPicture*, int, int, int, int, s16*, u8
 }
 
 /* 8002E204-8002E254       .text fopMsgM_Create__FsPFPv_iPv */
-fpc_ProcID fopMsgM_Create(s16, int (*)(void*), void*) {
+fpc_ProcID fopMsgM_Create(s16, fopMsgCreateFunc, void*) {
     /* Nonmatching */
 }
 
diff --git a/src/m_Do/m_Do_gba_com.cpp b/src/m_Do/m_Do_gba_com.cpp
index 57b28331..f295ff7f 100644
--- a/src/m_Do/m_Do_gba_com.cpp
+++ b/src/m_Do/m_Do_gba_com.cpp
@@ -108,7 +108,7 @@ void mDoGaC_agbCom_c::mDoGaC_Initial(mDoGaC_DataManag_c* param_0, u8 param_1) {
         param_0[i].field_0x5 = 0;
     }
 
-    field_0x114 = -1;
+    field_0x114 = 0xFFFFFFFF;
     field_0x118 = 0;
 
     field_0x12c.U16._12e_1 = (u32)cM_rndF(32767.0f);
@@ -529,15 +529,15 @@ void mDoGaC_agbCom_c::mDoGaC_GbaWrite() {
     if (field_0xa == field_0x9) {
         if (field_0x5 == 1) {
             mDoGaC_ComStop();
-            field_0x114 = -0x10101011;
+            field_0x114 = 0xEFEFEFEF;
         } else {
-            field_0x114 = -1;
+            field_0x114 = 0xFFFFFFFF;
         }
     } else {
         mDoGaC_unk_data* temp_r31 = &field_0xc[field_0xa];
         switch (field_0x8) {
         case 0:
-            field_0x114 = BigLittleChange(-0x01010102);
+            field_0x114 = BigLittleChange(0xFEFEFEFE);
             field_0x8 = 1;
             break;
         case 1:
@@ -592,7 +592,7 @@ void mDoGaC_agbCom_c::mDoGaC_GbaWrite() {
             }
             break;
         default:
-            field_0x114 = -1;
+            field_0x114 = 0xFFFFFFFF;
             break;
         }
     }
@@ -628,7 +628,7 @@ void mDoGaC_agbCom_c::mDoGaC_ReadResult() {
         switch (field_0x7) {
         case 0:
             u32 temp_r0 = BigLittleChange(field_0x118);
-            if (temp_r0 == -0x1010102) {
+            if (temp_r0 == 0xFEFEFEFE) {
                 field_0x7 = 1;
             }
             break;