diff --git a/src/libui_sdl/main.cpp b/src/libui_sdl/main.cpp
index 39c2ac39..7374ae60 100644
--- a/src/libui_sdl/main.cpp
+++ b/src/libui_sdl/main.cpp
@@ -154,6 +154,7 @@ void MicLoadWav(char* name)
     memset(&format, 0, sizeof(SDL_AudioSpec));
 
     if (MicWavBuffer) delete[] MicWavBuffer;
+    MicWavBuffer = NULL;
     MicWavLength = 0;
 
     u8* buf;