diff --git a/dist/mercury/segatools.ini b/dist/mercury/segatools.ini
index 4dac2cfa..009ce65b 100644
--- a/dist/mercury/segatools.ini
+++ b/dist/mercury/segatools.ini
@@ -37,6 +37,6 @@ subnet=192.168.250.0
 ; Input API selection for JVS input emulator.
 test=0x2D
 service=0x2E
-volup=0x24
-voldown=0x23
+volup=0x26
+voldown=0x28
 
diff --git a/mercuryio/config.c b/mercuryio/config.c
index 1b2a30f4..6e67e42a 100644
--- a/mercuryio/config.c
+++ b/mercuryio/config.c
@@ -29,8 +29,8 @@ void mercury_io_config_load(
 
     cfg->vk_test = GetPrivateProfileIntW(L"io4", L"test", 0x2D, filename);
     cfg->vk_service = GetPrivateProfileIntW(L"io4", L"service", 0x2E, filename);
-    cfg->vk_vol_up = GetPrivateProfileIntW(L"io4", L"volup", 0x24, filename);
-    cfg->vk_vol_down = GetPrivateProfileIntW(L"io4", L"voldown", 0x23, filename);
+    cfg->vk_vol_up = GetPrivateProfileIntW(L"io4", L"volup", 0x26, filename);
+    cfg->vk_vol_down = GetPrivateProfileIntW(L"io4", L"voldown", 0x28, filename);
 
     for (i = 0 ; i < 240 ; i++) {
         swprintf_s(key, _countof(key), L"cell%i", i + 1);