diff --git a/CMake/PickyWarnings.cmake b/CMake/PickyWarnings.cmake
index c811d2ef47..6d445159f4 100644
--- a/CMake/PickyWarnings.cmake
+++ b/CMake/PickyWarnings.cmake
@@ -251,8 +251,6 @@ if(PICKY_COMPILER)
          (CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 17.0))
         list(APPEND _picky_enable
           -Wformat-signedness              # clang 19.1  gcc  5.1  appleclang 17.0  # In clang-cl enums are signed ints by default
-            -Wno-error=format-signedness
-            -Wno-error=format
         )
       endif()
       if((CMAKE_C_COMPILER_ID STREQUAL "Clang"      AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 21.1) OR
@@ -309,8 +307,6 @@ if(PICKY_COMPILER)
         list(APPEND _picky_enable
           -Warray-bounds=2                 # clang  2.9  gcc  5.0 (clang default: -Warray-bounds)
           -Wformat-signedness              # clang 19.1  gcc  5.1  appleclang 17.0
-            -Wno-error=format-signedness
-            -Wno-error=format
         )
       endif()
       if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0)
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index fe72cb81a5..5607952878 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -941,8 +941,6 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
           dnl clang 19 or later
           if test "$compiler_num" -ge "1901"; then
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [format-signedness])
-            tmp_CFLAGS="$tmp_CFLAGS -Wno-error=format-signedness"
-            tmp_CFLAGS="$tmp_CFLAGS -Wno-error=format"
           fi
           dnl clang 20 or later
           if test "$compiler_num" -ge "2001"; then
@@ -1137,8 +1135,6 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
           if test "$compiler_num" -ge "500"; then
             tmp_CFLAGS="$tmp_CFLAGS -Warray-bounds=2"
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [format-signedness])
-            tmp_CFLAGS="$tmp_CFLAGS -Wno-error=format-signedness"
-            tmp_CFLAGS="$tmp_CFLAGS -Wno-error=format"
           fi
 
           dnl Only gcc 6 or later