diff --git a/src/arch/arm/fastmodel/remote_gdb.cc b/src/arch/arm/fastmodel/remote_gdb.cc
index 555439ed75..0999f40ddd 100644
--- a/src/arch/arm/fastmodel/remote_gdb.cc
+++ b/src/arch/arm/fastmodel/remote_gdb.cc
@@ -63,7 +63,7 @@ FastmodelRemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
 
 FastmodelRemoteGDB::FastmodelRemoteGDB(System *_system,
         ListenSocketConfig _listen_config)
-    : gem5::ArmISA::RemoteGDB(_system, _listen_config)
+    : gem5::ArmISA::RemoteGDB(_system, _listen_config), regCache64(this)
 {
 }