diff --git a/src/dmg/GB.cpp b/src/dmg/GB.cpp
index fe8760f5..89452e8e 100644
--- a/src/dmg/GB.cpp
+++ b/src/dmg/GB.cpp
@@ -4017,6 +4017,11 @@ void gbCleanUp()
     gbRom = NULL;
   }
 
+  if(bios != NULL) {
+    free(bios);
+    bios = NULL;
+  }
+
   if(gbMemory != NULL) {
     free(gbMemory);
     gbMemory = NULL;