diff --git a/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp b/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
index a9c360ff7..4e61549e5 100644
--- a/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
+++ b/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
@@ -251,6 +251,7 @@ void WrappedOpenGL::glAttachShader(GLuint program, GLuint shader)
 		GLResourceRecord *progRecord = GetResourceManager()->GetResourceRecord(ProgramRes(GetCtx(), program));
 		GLResourceRecord *shadRecord = GetResourceManager()->GetResourceRecord(ShaderRes(GetCtx(), shader));
 		RDCASSERT(progRecord && shadRecord);
+		if(progRecord && shadRecord)
 		{
 			SCOPED_SERIALISE_CONTEXT(ATTACHSHADER);
 			Serialise_glAttachShader(program, shader);