diff --git a/Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp b/Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp
index 2505a4eafc..0df1c338b5 100644
--- a/Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp
+++ b/Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp
@@ -742,7 +742,7 @@ void Interpreter::stswx(UGeckoInstruction _inst)
     if (i == 32)
     {
       i = 0;
-      r++;
+      r = (r + 1) & 0x1f;  // wrap
     }
   }
 }