diff --git a/src/alloy/backend/ivm/ivm_function.cc b/src/alloy/backend/ivm/ivm_function.cc
index 8cd6835d6..335dc7c87 100644
--- a/src/alloy/backend/ivm/ivm_function.cc
+++ b/src/alloy/backend/ivm/ivm_function.cc
@@ -115,7 +115,6 @@ int IVMFunction::CallImpl(ThreadState* thread_state) {
   ics.rf = register_file;
   ics.context = (uint8_t*)thread_state->raw_context();
   ics.membase = memory->membase();
-  ics.reserve_address = memory->reserve_address();
   ics.did_carry = 0;
   ics.did_saturate = 0;
   ics.access_callbacks = thread_state->runtime()->access_callbacks();
diff --git a/src/alloy/backend/ivm/ivm_intcode.h b/src/alloy/backend/ivm/ivm_intcode.h
index 9f361b2f9..d5ba5cfec 100644
--- a/src/alloy/backend/ivm/ivm_intcode.h
+++ b/src/alloy/backend/ivm/ivm_intcode.h
@@ -43,7 +43,6 @@ typedef struct {
   Register*     rf;
   uint8_t*      context;
   uint8_t*      membase;
-  uint32_t*     reserve_address;
   int8_t        did_carry;
   int8_t        did_saturate;
   runtime::RegisterAccessCallbacks* access_callbacks;
diff --git a/src/alloy/memory.cc b/src/alloy/memory.cc
index 4948d22d6..8b4eaa2e3 100644
--- a/src/alloy/memory.cc
+++ b/src/alloy/memory.cc
@@ -13,7 +13,7 @@ using namespace alloy;
 
 
 Memory::Memory() :
-    membase_(0) {
+    membase_(0), reserve_address_(0) {
   SYSTEM_INFO si;
   GetSystemInfo(&si);
   system_page_size_ = si.dwPageSize;