diff --git a/src/pokenav_unk_10.c b/src/pokenav_unk_10.c
index cd2920c30..135ff24b3 100644
--- a/src/pokenav_unk_10.c
+++ b/src/pokenav_unk_10.c
@@ -472,7 +472,7 @@ bool32 sub_81D0978(void)
     return TRUE;
 }
 
-void sub_81D09B0(int id)
+void sub_81D09B0(s32 id)
 {
     struct PokenavSub14 *structPtr = GetSubstructPtr(14);
     structPtr->loopedTaskId = CreateLoopedTask(gUnknown_08624BA0[id], 1);
diff --git a/src/pokenav_unk_7.c b/src/pokenav_unk_7.c
index 90b677fa7..34432a077 100644
--- a/src/pokenav_unk_7.c
+++ b/src/pokenav_unk_7.c
@@ -168,7 +168,7 @@ bool32 sub_81CDDD4(void)
     return TRUE;
 }
 
-void sub_81CDE2C(int id)
+void sub_81CDE2C(s32 id)
 {
     struct Pokenav7Struct *structPtr = GetSubstructPtr(0xC);
     structPtr->loopedTaskId = CreateLoopedTask(gUnknown_08623384[id], 1);