diff --git a/include/clad/Differentiator/Differentiator.h b/include/clad/Differentiator/Differentiator.h
index fd917b365..29e5c49da 100644
--- a/include/clad/Differentiator/Differentiator.h
+++ b/include/clad/Differentiator/Differentiator.h
@@ -211,7 +211,7 @@ CUDA_HOST_DEVICE T push(tape<T>& to, ArgsT... val) {
                                   bool CUDAkernel = false)
       requires(!ImmediateMode)
         : m_Function(f), m_Functor(functor), m_CUDAkernel(CUDAkernel) {
-#ifndef __CLAD_SO_LOADED
+#ifndef __CLAD__
       static_assert(false, "clad doesn't appear to be loaded; make sure that "
                            "you pass clad.so to clang.");
 #endif
@@ -229,7 +229,7 @@ CUDA_HOST_DEVICE T push(tape<T>& to, ArgsT... val) {
         : m_Function(f), m_Code("<constexpr functions don't have support for "
                                 "printing the derivative yet>"),
           m_Functor(functor), m_CUDAkernel(CUDAkernel) {
-#ifndef __CLAD_SO_LOADED
+#ifndef __CLAD__
       static_assert(false, "clad doesn't appear to be loaded; make sure that "
                            "you pass clad.so to clang.");
 #endif
@@ -239,7 +239,7 @@ CUDA_HOST_DEVICE T push(tape<T>& to, ArgsT... val) {
                                   FunctorType* functor = nullptr,
                                   bool CUDAkernel = false)
         : m_Function(f), m_Functor(functor), m_CUDAkernel(CUDAkernel) {
-#ifndef __CLAD_SO_LOADED
+#ifndef __CLAD__
       static_assert(false, "clad doesn't appear to be loaded; make sure that "
                            "you pass clad.so to clang.");
 #endif
diff --git a/tools/ClangPlugin.cpp b/tools/ClangPlugin.cpp
index 315f2506b..bf28de164 100644
--- a/tools/ClangPlugin.cpp
+++ b/tools/ClangPlugin.cpp
@@ -91,10 +91,10 @@ namespace clad {
       }
 #endif // CLANG_VERSION_MAJOR > 8
 
-      // Add define for __CLAD_SO_LOADED, so that CladFunction::CladFunction()
+      // Add define for __CLAD__, so that CladFunction::CladFunction()
       // doesn't throw an error.
       auto predefines = m_CI.getPreprocessor().getPredefines();
-      predefines.append("#define __CLAD_SO_LOADED 1\n");
+      predefines.append("#define __CLAD__ 1\n");
       m_CI.getPreprocessor().setPredefines(predefines);
     }