diff --git a/src/windows-emulator/process_context.hpp b/src/windows-emulator/process_context.hpp
index 35ff9496..c04ae56b 100644
--- a/src/windows-emulator/process_context.hpp
+++ b/src/windows-emulator/process_context.hpp
@@ -10,7 +10,7 @@
 #include <x64_emulator.hpp>
 
 
-#define PEB_SEGMENT_SIZE (1 << 20) // 1 MB
+#define PEB_SEGMENT_SIZE (20 << 20) // 20 MB
 #define GS_SEGMENT_SIZE (1 << 20) // 1 MB
 
 #define IA32_GS_BASE_MSR 0xC0000101