diff --git a/renderdoc/driver/shaders/dxil/dxil_bytecode.cpp b/renderdoc/driver/shaders/dxil/dxil_bytecode.cpp
index 7db47775d..bc0d204be 100644
--- a/renderdoc/driver/shaders/dxil/dxil_bytecode.cpp
+++ b/renderdoc/driver/shaders/dxil/dxil_bytecode.cpp
@@ -1900,7 +1900,7 @@ Program::Program(const byte *bytes, size_t length)
                 int64_t valSrc = LLVMBC::BitReader::svbr(op.get<uint64_t>());
                 uint64_t blockSrc = op.get<uint64_t>();
 
-                if(valSrc < 0)
+                if(valSrc <= 0)
                 {
                   inst.args.push_back(Symbol(SymbolType::Unknown, m_Symbols.size() - valSrc));
                 }