diff --git a/SpotifyKeyDumper/Hooks.cpp b/SpotifyKeyDumper/Hooks.cpp
index c156e72..3531a62 100644
--- a/SpotifyKeyDumper/Hooks.cpp
+++ b/SpotifyKeyDumper/Hooks.cpp
@@ -200,6 +200,10 @@ int* __fastcall log_hook_v45(void* This, void* _EDX, int a2, int a3, void* a4, c
 
 void __fastcall fileIdWriter_hook_v45(void* This, void* _EDX, int* a2)
 {
+	// Program sometimes crashes after ads. Could possibly be due to bad pointers
+	if (Utils::BadPtr(a2) || Utils::BadPtr(a2 + 16) || Utils::BadPtr((char*)*(DWORD*)(a2 + 16)))
+		return;
+
 	// [[ebp+8]+28]
 	char* fileId = (char*) *(DWORD*)(a2 + 16); // 0x40 / 4 = 16
 	::fileId = std::string(fileId);