diff --git a/CMakeLists.txt b/CMakeLists.txt
index e326f123646..d4dd40cf66f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2141,7 +2141,6 @@ add_custom_command(
         -DAPPLICATION_SOURCE_DIR=${APPLICATION_SOURCE_DIR}
         -DINTERFACE_INCLUDE_DIRECTORIES="$<TARGET_PROPERTY:zephyr_interface,INTERFACE_INCLUDE_DIRECTORIES>"
         -Dllext_edk_file=${llext_edk_file}
-        -DAUTOCONF_H=${AUTOCONF_H}
         -Dllext_cflags="${llext_edk_cflags}"
         -Dllext_edk_name=${CONFIG_LLEXT_EDK_NAME}
         -DWEST_TOPDIR=${WEST_TOPDIR}
diff --git a/cmake/llext-edk.cmake b/cmake/llext-edk.cmake
index 91b4b0ef9ac..8bd48a0b2fd 100644
--- a/cmake/llext-edk.cmake
+++ b/cmake/llext-edk.cmake
@@ -17,7 +17,6 @@
 # - INTERFACE_INCLUDE_DIRECTORIES: List of include directories to copy headers
 #   from. It should simply be the INTERFACE_INCLUDE_DIRECTORIES property of the
 #   zephyr_interface target.
-# - AUTOCONF_H: Name of the autoconf.h file, used to generate the imacros flag.
 # - llext_edk_file: Output file name for the tarball.
 # - llext_cflags: Additional flags to be added to the generated flags.
 # - ZEPHYR_BASE: Path to the zephyr base directory.
@@ -120,9 +119,6 @@ endforeach()
 set(llext_cflags ${new_cflags})
 
 
-set(autoconf_h_edk ${llext_edk_inc}/${AUTOCONF_H})
-cmake_path(RELATIVE_PATH AUTOCONF_H BASE_DIRECTORY ${PROJECT_BINARY_DIR} OUTPUT_VARIABLE autoconf_h_rel)
-
 list(APPEND base_flags_make ${llext_cflags} ${imacros_make})
 list(APPEND base_flags_cmake ${llext_cflags} ${imacros_cmake})