diff --git a/src/core/hle/libraries/libuserservice/libuserservice.cpp b/src/core/hle/libraries/libuserservice/libuserservice.cpp
index bfa30955d..581bfa8cf 100644
--- a/src/core/hle/libraries/libuserservice/libuserservice.cpp
+++ b/src/core/hle/libraries/libuserservice/libuserservice.cpp
@@ -21,7 +21,7 @@ s32 PS4_SYSV_ABI sceUserServiceGetLoginUserIdList(SceUserServiceLoginUserIdList*
     return SCE_OK;
 }
 
-s32 sceUserServiceGetInitialUser(SceUserServiceUserId* userId) {
+s32 PS4_SYSV_ABI sceUserServiceGetInitialUser(SceUserServiceUserId* userId) {
     PRINT_DUMMY_FUNCTION_NAME();
     *userId = 1;  // first player only
     return SCE_OK;
diff --git a/src/core/hle/libraries/libuserservice/libuserservice.h b/src/core/hle/libraries/libuserservice/libuserservice.h
index 522a5c4c8..81854d58d 100644
--- a/src/core/hle/libraries/libuserservice/libuserservice.h
+++ b/src/core/hle/libraries/libuserservice/libuserservice.h
@@ -20,7 +20,7 @@ struct SceUserServiceLoginUserIdList {
 
 s32 PS4_SYSV_ABI sceUserServiceInitialize(const SceUserServiceInitializeParams* initParams);
 s32 PS4_SYSV_ABI sceUserServiceGetLoginUserIdList(SceUserServiceLoginUserIdList* userIdList);
-s32 sceUserServiceGetInitialUser(SceUserServiceUserId* userId);
+s32 PS4_SYSV_ABI sceUserServiceGetInitialUser(SceUserServiceUserId* userId);
 
 void userServiceSymbolsRegister(Loader::SymbolsResolver* sym);