diff --git a/port/cpl_error.cpp b/port/cpl_error.cpp
index 522cb9c97158..37208d8f0d43 100644
--- a/port/cpl_error.cpp
+++ b/port/cpl_error.cpp
@@ -1535,30 +1535,6 @@ bool CPLIsDefaultErrorHandlerAndCatchDebug()
            gbCatchDebug && pfnErrorHandler == CPLDefaultErrorHandler;
 }
 
-/************************************************************************/
-/*                    CPLErrorAccumulatorFunc()                         */
-/************************************************************************/
-
-static void CPL_STDCALL CPLErrorAccumulatorFunc(CPLErr eErr, CPLErrorNum no,
-                                                const char *msg)
-{
-    std::vector<CPLErrorHandlerAccumulatorStruct> *paoErrors =
-        static_cast<std::vector<CPLErrorHandlerAccumulatorStruct> *>(
-            CPLGetErrorHandlerUserData());
-    paoErrors->push_back(CPLErrorHandlerAccumulatorStruct(eErr, no, msg));
-}
-
-void CPLInstallErrorHandlerAccumulator(
-    std::vector<CPLErrorHandlerAccumulatorStruct> &aoErrors)
-{
-    CPLPushErrorHandlerEx(CPLErrorAccumulatorFunc, &aoErrors);
-}
-
-void CPLUninstallErrorHandlerAccumulator()
-{
-    CPLPopErrorHandler();
-}
-
 /************************************************************************/
 /*               CPLErrorStateBackuper::CPLErrorStateBackuper()         */
 /************************************************************************/
diff --git a/port/cpl_error_internal.h b/port/cpl_error_internal.h
index 3fcff32952b3..bb44e7ab360b 100644
--- a/port/cpl_error_internal.h
+++ b/port/cpl_error_internal.h
@@ -45,10 +45,6 @@ class CPL_DLL CPLErrorHandlerAccumulatorStruct
     }
 };
 
-void CPL_DLL CPLInstallErrorHandlerAccumulator(
-    std::vector<CPLErrorHandlerAccumulatorStruct> &aoErrors);
-void CPL_DLL CPLUninstallErrorHandlerAccumulator();
-
 /************************************************************************/
 /*                       CPLErrorAccumulator                            */
 /************************************************************************/