diff --git a/libafl_cc/src/ctx-pass.cc b/libafl_cc/src/ctx-pass.cc
index 1a92788c59..aa558edee6 100644
--- a/libafl_cc/src/ctx-pass.cc
+++ b/libafl_cc/src/ctx-pass.cc
@@ -93,7 +93,11 @@ class CtxPass : public ModulePass {
  private:
   bool isLLVMIntrinsicFn(StringRef &n) {
     // Not interested in these LLVM's functions
+#if LLVM_VERSION_MAJOR >= 18
+    if (n.starts_with("llvm.")) {
+#else
     if (n.startswith("llvm.")) {
+#endif
       return true;
     } else {
       return false;
diff --git a/libafl_cc/src/dump-cfg-pass.cc b/libafl_cc/src/dump-cfg-pass.cc
index 01daa24303..8fda3e0a9c 100644
--- a/libafl_cc/src/dump-cfg-pass.cc
+++ b/libafl_cc/src/dump-cfg-pass.cc
@@ -101,12 +101,18 @@ class DumpCfgPass : public ModulePass {
  private:
   bool isLLVMIntrinsicFn(StringRef &n) {
     // Not interested in these LLVM's functions
+#if LLVM_VERSION_MAJOR >= 18
+    if (n.starts_with("llvm.")) {
+#else
     if (n.startswith("llvm.")) {
-      return true;
-    } else {
-      return false;
+#endif
     }
+    return true;
   }
+  else {
+    return false;
+  }
+}
 };
 
 }  // namespace