diff --git a/pcsx2/DebugTools/DisassemblyManager.cpp b/pcsx2/DebugTools/DisassemblyManager.cpp
index 22b2612535..9c542e0f7a 100644
--- a/pcsx2/DebugTools/DisassemblyManager.cpp
+++ b/pcsx2/DebugTools/DisassemblyManager.cpp
@@ -992,6 +992,8 @@ void DisassemblyData::createLines()
 				}
 				break;
 			default:
+				// Avoid a call to strlen with random data
+				buffer[0] = 0;
 				break;
 			}