diff --git a/CMakeLists.txt b/CMakeLists.txt
index 162373182b..12ddc2738d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,17 +100,6 @@ option(USE_SHARED_MBEDTLS_LIBRARY "Build Mbed TLS shared library." OFF)
 option(LINK_WITH_PTHREAD "Explicitly link Mbed TLS library to pthread." OFF)
 option(LINK_WITH_TRUSTED_STORAGE "Explicitly link Mbed TLS library to trusted_storage." OFF)
 
-# Warning string - created as a list for compatibility with CMake 2.8
-set(CTR_DRBG_128_BIT_KEY_WARN_L1 "****  WARNING!  MBEDTLS_CTR_DRBG_USE_128_BIT_KEY defined!\n")
-set(CTR_DRBG_128_BIT_KEY_WARN_L2 "****  Using 128-bit keys for CTR_DRBG limits the security of generated\n")
-set(CTR_DRBG_128_BIT_KEY_WARN_L3 "****  keys and operations that use random values generated to 128-bit security\n")
-
-set(CTR_DRBG_128_BIT_KEY_WARNING "${WARNING_BORDER}"
-                         "${CTR_DRBG_128_BIT_KEY_WARN_L1}"
-                         "${CTR_DRBG_128_BIT_KEY_WARN_L2}"
-                         "${CTR_DRBG_128_BIT_KEY_WARN_L3}"
-                         "${WARNING_BORDER}")
-
 # Python 3 is only needed here to check for configuration warnings.
 if(NOT CMAKE_VERSION VERSION_LESS 3.15.0)
     set(Python3_FIND_STRATEGY LOCATION)
@@ -124,16 +113,6 @@ else()
         set(MBEDTLS_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE})
     endif()
 endif()
-if(MBEDTLS_PYTHON_EXECUTABLE)
-
-    # If 128-bit keys are configured for CTR_DRBG, display an appropriate warning
-    execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/include/mbedtls/mbedtls_config.h get MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
-                        RESULT_VARIABLE result)
-    if(${result} EQUAL 0)
-        message(WARNING ${CTR_DRBG_128_BIT_KEY_WARNING})
-    endif()
-
-endif()
 
 # We now potentially need to link all executables against PThreads, if available
 set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
diff --git a/Makefile b/Makefile
index a580736602..6706143a24 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,6 @@ endif
 .PHONY: all no_test programs lib tests install uninstall clean test check lcov apidoc apidoc_clean
 
 all: programs tests
-	$(MAKE) post_build
 
 no_test: programs
 
@@ -146,24 +145,6 @@ uninstall:
 	done
 endif
 
-
-WARNING_BORDER_LONG      =**********************************************************************************\n
-CTR_DRBG_128_BIT_KEY_WARN_L1=****  WARNING!  MBEDTLS_CTR_DRBG_USE_128_BIT_KEY defined!                      ****\n
-CTR_DRBG_128_BIT_KEY_WARN_L2=****  Using 128-bit keys for CTR_DRBG limits the security of generated         ****\n
-CTR_DRBG_128_BIT_KEY_WARN_L3=****  keys and operations that use random values generated to 128-bit security ****\n
-
-CTR_DRBG_128_BIT_KEY_WARNING=\n$(WARNING_BORDER_LONG)$(CTR_DRBG_128_BIT_KEY_WARN_L1)$(CTR_DRBG_128_BIT_KEY_WARN_L2)$(CTR_DRBG_128_BIT_KEY_WARN_L3)$(WARNING_BORDER_LONG)
-
-# Post build steps
-post_build:
-ifndef WINDOWS
-
-	# If 128-bit keys are configured for CTR_DRBG, display an appropriate warning
-	-scripts/config.py get MBEDTLS_CTR_DRBG_USE_128_BIT_KEY && ([ $$? -eq 0 ]) && \
-	    echo '$(CTR_DRBG_128_BIT_KEY_WARNING)'
-
-endif
-
 clean: clean_more_on_top
 	$(MAKE) -C library clean
 	$(MAKE) -C programs clean