diff --git a/src/link_rfu.c b/src/link_rfu.c
index 1f3ae4f3c5..4b0b0a2a51 100644
--- a/src/link_rfu.c
+++ b/src/link_rfu.c
@@ -2482,7 +2482,7 @@ void WipeTrainerNameRecords(void)
     }
 }
 
-void nullsub_5(const char *unused_0, u8 unused_1, u8 unused_2)
+void nullsub_5(const void *unused_0, u8 unused_1, u8 unused_2)
 {
     // debug?
 }
@@ -2512,7 +2512,7 @@ void sub_800E604(void)
     sub_800D724(&gUnknown_03005000.unk_9e8);
     CpuFill16(0, gSendCmd, sizeof gSendCmd);
     CpuFill16(0, gRecvCmds, sizeof gRecvCmds);
-    CpuFill16(0, gLinkPlayers, sizeof gLinkPlayers)
+    CpuFill16(0, gLinkPlayers, sizeof gLinkPlayers);
 }
 
 void sub_800E6D0(void)
diff --git a/src/pokedex.c b/src/pokedex.c
index da3f06bf1c..0e532ed920 100644
--- a/src/pokedex.c
+++ b/src/pokedex.c
@@ -1319,7 +1319,7 @@ void CB2_Pokedex(void)
         default:
             SetVBlankCallback(NULL);
             sub_80C09B0(0);
-            DmaFillLarge16(3, 0, (u8 *)VRAM, VRAM_SIZE, 0x1000)
+            DmaFillLarge16(3, 0, (u8 *)VRAM, VRAM_SIZE, 0x1000);
             DmaClear32(3, OAM, OAM_SIZE);
             DmaClear16(3, PLTT, PLTT_SIZE);
             gMain.state = 1;
diff --git a/src/pokenav_unk_5.c b/src/pokenav_unk_5.c
index c4e4f38ce9..5226a34b3f 100755
--- a/src/pokenav_unk_5.c
+++ b/src/pokenav_unk_5.c
@@ -194,7 +194,7 @@ void sub_81CC524(void)
 u32 sub_81CC554(void)
 {
     struct Pokenav5Struct *state = GetSubstructPtr(3);
-    state->unk10(state);
+    return state->unk10(state);
 }
 
 static u32 sub_81CC568(struct Pokenav5Struct *state)
diff --git a/src/pokenav_unk_6.c b/src/pokenav_unk_6.c
index 638884d3f0..7b357ffb44 100644
--- a/src/pokenav_unk_6.c
+++ b/src/pokenav_unk_6.c
@@ -365,7 +365,7 @@ u8 *sub_81CD624(u8 *str, u16 id, bool8 arg3)
 
     str_ = str; // For some reason, a variable is needed to match.
     while (*str_ != EOS)
-        *(str_++);
+        (str_++);
 
     *(str_++) = EXT_CTRL_CODE_BEGIN;
     *(str_++) = 0x12;