diff --git a/ChangeLog.txt b/ChangeLog.txt
index 16c64027b8..c53183b3ed 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,20 @@
    Entries may not always be in chronological/commit order.
    See license at the end of file. */
 
+2025-01-25 11:14 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
+  * contrib/hbcurl/core.c
+    ! declare buffer for CURLOPT_ERRORBUFFER as 'char *' instead of
+      'unsigned char *', the exact buffer type is chcked in typecheck-gcc.h
+      and 'unsigned char *' does not pass this test
+    ; QUESTION:
+      Why curl_easy_setopt( <pCurl>, HB_CURLOPT_ER_BUFF_SETUP, [<nBufSize>] )
+      accepts <nBufSize> parameter?
+      Buffer smaller then CURL_ERROR_SIZE means GPF and larger waste of memory.
+      The only acceptable value for <nBufSize> is CURL_ERROR_SIZE.
+      The allocate buffer should be initialized with '\0' otherwise we will
+      have other GPF trap when user call curl_easy_er_buff_get() before any
+      error is set. This bug was fixed in CURL 7.60.0.
+
 2025-01-25 10:19 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
   * .github/workflows/vm1-ci.yml
   * .github/workflows/vm2-ci.yml
diff --git a/contrib/hbcurl/core.c b/contrib/hbcurl/core.c
index 3d076ca85b..07394f5723 100644
--- a/contrib/hbcurl/core.c
+++ b/contrib/hbcurl/core.c
@@ -118,8 +118,8 @@ typedef struct _HB_CURL
    size_t          dl_len;
    size_t          dl_pos;
 
-   unsigned char * er_ptr;
-   size_t          er_len;
+   char * er_ptr;
+   size_t er_len;
 
    PHB_ITEM pProgressCallback;
    PHB_ITEM pDebugCallback;
@@ -984,7 +984,7 @@ HB_FUNC( CURL_EASY_SETOPT )
             case HB_CURLOPT_ER_BUFF_SETUP:
                hb_curl_buff_er_free( hb_curl );
                hb_curl->er_len = hb_parnldef( 3, HB_CURL_ER_BUFF_SIZE_INIT );
-               hb_curl->er_ptr = ( unsigned char * ) hb_xgrab( hb_curl->er_len );
+               hb_curl->er_ptr = ( char * ) hb_xgrab( hb_curl->er_len );
                res = curl_easy_setopt( hb_curl->curl, CURLOPT_ERRORBUFFER, hb_curl->er_ptr );
                break;
 #endif
@@ -2064,7 +2064,7 @@ HB_FUNC( CURL_EASY_ER_BUFF_GET )
       PHB_CURL hb_curl = PHB_CURL_par( 1 );
 
       if( hb_curl )
-         hb_retc( ( char * ) hb_curl->er_ptr );
+         hb_retc( hb_curl->er_ptr );
       else
 #endif
          hb_retc_null();