diff --git a/src/sound/CVarHandlers.cpp b/src/sound/CVarHandlers.cpp
index 08537e5..bbd261c 100644
--- a/src/sound/CVarHandlers.cpp
+++ b/src/sound/CVarHandlers.cpp
@@ -122,6 +122,9 @@ bool MusicVolume_CVarCallback(CVar* var, const char* oldValue, const char* value
 }
 
 bool SFXVolume_CVarCallback(CVar* var, const char* oldValue, const char* value, void* arg) {
-    // TODO
-    WHOA_UNIMPLEMENTED(true);
+    auto volume = SStrToFloat(value);
+
+    SESound::SetChannelGroupVolume("SFX", volume);
+
+    return true;
 }