diff --git a/Core/MIPS/MIPSStackWalk.cpp b/Core/MIPS/MIPSStackWalk.cpp
index 8c6305f4f8..7f3589dab6 100644
--- a/Core/MIPS/MIPSStackWalk.cpp
+++ b/Core/MIPS/MIPSStackWalk.cpp
@@ -94,6 +94,11 @@ namespace MIPSStackWalk {
 				stop = PSP_GetScratchpadMemoryBase();
 			}
 		}
+
+		if (!Memory::IsValidAddress(start)) {
+			return false;
+		}
+
 		if (stop < start - LONGEST_FUNCTION) {
 			stop = start - LONGEST_FUNCTION;
 		}