diff --git a/llvm/lib/SYCL/InSPIRation/InSPIRation.cpp b/llvm/lib/SYCL/InSPIRation/InSPIRation.cpp
index 93e4a1a74994..3fe37a2ba8f4 100644
--- a/llvm/lib/SYCL/InSPIRation/InSPIRation.cpp
+++ b/llvm/lib/SYCL/InSPIRation/InSPIRation.cpp
@@ -244,7 +244,7 @@ struct InSPIRation : public ModulePass {
     ///       changing all the names to a SHA-1 hash. Like asking for an update
     ///       to the xocc compiler to accept characters that appear in mangled
     ///       names
-    F.setName(std::to_string(uuidHashValue));
+    F.setName("x" + std::to_string(uuidHashValue));
   }
 
   /// Add metadata for the SPIR 2.0 version
diff --git a/sycl/source/detail/program_manager/program_manager.cpp b/sycl/source/detail/program_manager/program_manager.cpp
index c70e8f9d2114..8ab0beadddc1 100644
--- a/sycl/source/detail/program_manager/program_manager.cpp
+++ b/sycl/source/detail/program_manager/program_manager.cpp
@@ -116,7 +116,7 @@ static std::string getUniqueName(const char *KernelName) {
   boost::hash<boost::uuids::uuid> uuid_hasher;
   std::size_t uuid_hash_value = uuid_hasher(udoc);
 
-  return std::to_string(uuid_hash_value);
+  return "x" + std::to_string(uuid_hash_value);
 }
 
 cl_kernel ProgramManager::getOrCreateKernel(OSModuleHandle M,