diff --git a/DevTools/UserspaceEmulator/SoftCPU.cpp b/DevTools/UserspaceEmulator/SoftCPU.cpp
index 9323c96434..d88306802f 100644
--- a/DevTools/UserspaceEmulator/SoftCPU.cpp
+++ b/DevTools/UserspaceEmulator/SoftCPU.cpp
@@ -28,12 +28,14 @@
 #include "Emulator.h"
 #include <AK/Assertions.h>
 #include <stdio.h>
+#include <string.h>
 
 namespace UserspaceEmulator {
 
 SoftCPU::SoftCPU(Emulator& emulator)
     : m_emulator(emulator)
 {
+    memset(m_gpr, 0, sizeof(m_gpr));
 }
 
 void SoftCPU::dump() const
diff --git a/DevTools/UserspaceEmulator/SoftCPU.h b/DevTools/UserspaceEmulator/SoftCPU.h
index fe25b6f6b7..ed09f93e75 100644
--- a/DevTools/UserspaceEmulator/SoftCPU.h
+++ b/DevTools/UserspaceEmulator/SoftCPU.h
@@ -35,7 +35,7 @@ class Emulator;
 
 union PartAddressableRegister {
     struct {
-        u32 full_u32 { 0 };
+        u32 full_u32;
     };
     struct {
         u16 low_u16;