diff --git a/src/c/CMakeLists.txt b/src/c/CMakeLists.txt
index 3668cb15..e96bd411 100644
--- a/src/c/CMakeLists.txt
+++ b/src/c/CMakeLists.txt
@@ -7,10 +7,16 @@ if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     # require at least Clang 9.0
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
         message(FATAL_ERROR "Clang++ version must be at least 9.0!")
-    elseif (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 15)
-        set(PERFFLOWASPECT_CLANG_15_NEWER TRUE CACHE BOOL "using >=clang15")
+    endif()
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 17)
+        set(PERFFLOWASPECT_CLANG_18_NEWER TRUE CACHE BOOL "using >clang17")
+        add_definitions(-DPERFFLOWASPECT_CLANG_18_NEWER)
+    endif()
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 15)
+        set(PERFFLOWASPECT_CLANG_15_NEWER TRUE CACHE BOOL "using >clang15")
         add_definitions(-DPERFFLOWASPECT_CLANG_15_NEWER)
-    elseif ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 11) AND (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15))
+    endif()
+    if ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 11) AND (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15))
         set(PERFFLOWASPECT_CLANG_11_NEWER TRUE CACHE BOOL "using >=clang11")
         set(PERFFLOWASPECT_CLANG_15_NEWER FALSE CACHE BOOL "using < clang15")
         add_definitions(-DPERFFLOWASPECT_CLANG_11_NEWER)
diff --git a/src/c/weaver/weave/perfflow_weave_common.cpp b/src/c/weaver/weave/perfflow_weave_common.cpp
index 0c8e28ad..3c41f103 100644
--- a/src/c/weaver/weave/perfflow_weave_common.cpp
+++ b/src/c/weaver/weave/perfflow_weave_common.cpp
@@ -145,14 +145,18 @@ bool weave_ns::WeaveCommon::insertAfter(Module &m, Function &f, StringRef &a,
     auto &context = m.getContext();
     Type *voidType = Type::getVoidTy(context);
     Type *int32Type = Type::getInt32Ty(context);
-    Type *int8PtrType = Type::getInt8PtrTy(context);
+#ifdef PERFFLOWASPECT_CLANG_18_NEWER
+    Type *int8Type = Type::getInt8Ty(context);
+#else
+    Type *int8Type = Type::getInt8PtrTy(context);
+#endif
     std::vector<llvm::Type *> params;
     params.push_back(int32Type);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
 
     // voidType is return type, params are parameters and no variable length args
     FunctionType *weaveFuncTy = FunctionType::get(voidType, params, false);
@@ -198,14 +202,18 @@ bool weave_ns::WeaveCommon::insertBefore(Module &m, Function &f, StringRef &a,
     auto &context = m.getContext();
     Type *voidType = Type::getVoidTy(context);
     Type *int32Type = Type::getInt32Ty(context);
-    Type *int8PtrType = Type::getInt8PtrTy(context);
+#ifdef PERFFLOWASPECT_CLANG_18_NEWER
+    Type *int8Type = Type::getInt8Ty(context);
+#else
+    Type *int8Type = Type::getInt8PtrTy(context);
+#endif
     std::vector<llvm::Type *> params;
     params.push_back(int32Type);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
-    params.push_back(int8PtrType);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
+    params.push_back(int8Type);
 
     // voidType is return type, params are parameters and no variable length args
     FunctionType *weaveFuncTy = FunctionType::get(voidType, params, false);