diff --git a/extensions/openpower-pels/meson.build b/extensions/openpower-pels/meson.build
index 8e1d038..39ea832 100644
--- a/extensions/openpower-pels/meson.build
+++ b/extensions/openpower-pels/meson.build
@@ -31,6 +31,7 @@
 
 extra_sources = []
 extra_dependencies = []
+extra_args = []
 
 build_phal = get_option('phal').enabled()
 
@@ -44,7 +45,12 @@
         cpp.find_library('pdbg'),
         cpp.find_library('ekb'),
     ]
-    add_project_arguments('-DSBE_FFDC_SUPPORTED', language : ['c','cpp'])
+    extra_args += [
+        '-DSBE_FFDC_SUPPORTED',
+    ]
+    log_manager_ext_args += [
+        '-DSBE_FFDC_SUPPORTED',
+    ]
 endif
 
 libpel_sources = files(
@@ -91,6 +97,7 @@
     libpel_sources,
     'paths.cpp', # paths is separate because it is overridden during test.
     include_directories: include_directories('../..', '../../gen'),
+    cpp_args: extra_args,
     dependencies: libpel_deps,
 )
 
diff --git a/meson.build b/meson.build
index 7e3099c..68db1cc 100644
--- a/meson.build
+++ b/meson.build
@@ -133,6 +133,7 @@
 
 log_manager_ext_sources = []
 log_manager_ext_deps = []
+log_manager_ext_args = []
 
 subdir('extensions')
 subdir('phosphor-rsyslog-config')
@@ -165,6 +166,7 @@
     log_manager_ext_sources,
     'log_manager_main.cpp',
     include_directories: include_directories('gen'),
+    cpp_args: log_manager_ext_args,
     dependencies: [
         log_manager_deps,
         log_manager_ext_deps,