diff --git a/renderdoc/driver/gl/gl_debug.cpp b/renderdoc/driver/gl/gl_debug.cpp
index cc676543f..d7aaae195 100644
--- a/renderdoc/driver/gl/gl_debug.cpp
+++ b/renderdoc/driver/gl/gl_debug.cpp
@@ -480,6 +480,7 @@ void GLReplay::InitDebugData()
 
   DebugData.fixedcolFragShader = DebugData.quadoverdrawFragShader = 0;
   DebugData.quadoverdrawResolveProg = 0;
+  DebugData.fixedcolFragShaderSPIRV = DebugData.quadoverdrawFragShaderSPIRV = 0;
 
   if(IsGLES)
   {