diff --git a/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp b/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
index 31af527f9..778ee5943 100644
--- a/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
+++ b/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
@@ -1046,7 +1046,7 @@ struct SPVInstruction
 						break;
 					case spv::OpISub:
 					case spv::OpFSub:
-						opstr[0] = '+';
+						opstr[0] = '-';
 						break;
 					case spv::OpIMul:
 					case spv::OpFMul: