diff --git a/src/os/code_4a140_len_70.c b/src/os/code_4a140_len_70.c
index 1609535112..983b0111fc 100644
--- a/src/os/code_4a140_len_70.c
+++ b/src/os/code_4a140_len_70.c
@@ -1,5 +1,5 @@
 #include "common.h"
 
-INCLUDE_API_ASM("os/code_4a140_len_70", strcpy);
+char* INCLUDE_ASM("os/code_4a140_len_70", strcpy, char* destination, const char* source);
 
-INCLUDE_API_ASM("os/code_4a140_len_70", strcmp);
+s32 INCLUDE_ASM("os/code_4a140_len_70", strcmp, const char* str1, const char* str2);
diff --git a/src/os/code_4a1b0_len_40.c b/src/os/code_4a1b0_len_40.c
index a3b8b5bb1a..762986f66d 100644
--- a/src/os/code_4a1b0_len_40.c
+++ b/src/os/code_4a1b0_len_40.c
@@ -1,3 +1,3 @@
 #include "common.h"
 
-INCLUDE_API_ASM("os/code_4a1b0_len_40", memset);
+void* INCLUDE_ASM("os/code_4a1b0_len_40", memset, void* ptr, s32 value, s32 num);