diff --git a/src/libcmd/meson.build b/src/libcmd/meson.build
index d9a90508a051..8548bea70483 100644
--- a/src/libcmd/meson.build
+++ b/src/libcmd/meson.build
@@ -64,6 +64,7 @@ add_project_arguments(
   '-include', 'config-util.hh',
   '-include', 'config-store.hh',
   # '-include', 'config-fetchers.h',
+  '-include', 'config-expr.hh',
   '-include', 'config-main.hh',
   '-include', 'config-cmd.hh',
   language : 'cpp',
diff --git a/src/libexpr/meson.build b/src/libexpr/meson.build
index 9fe7c17c4e5a..3025b6da1825 100644
--- a/src/libexpr/meson.build
+++ b/src/libexpr/meson.build
@@ -69,6 +69,7 @@ add_project_arguments(
   '-include', 'config-util.hh',
   '-include', 'config-store.hh',
   # '-include', 'config-fetchers.h',
+  '-include', 'config-expr.hh',
   language : 'cpp',
 )
 
diff --git a/tests/unit/libexpr/meson.build b/tests/unit/libexpr/meson.build
index a7b22f7f1e82..ee35258cf275 100644
--- a/tests/unit/libexpr/meson.build
+++ b/tests/unit/libexpr/meson.build
@@ -41,7 +41,7 @@ add_project_arguments(
   # It would be nice for our headers to be idempotent instead.
   '-include', 'config-util.hh',
   '-include', 'config-store.hh',
-  '-include', 'config-store.hh',
+  '-include', 'config-expr.hh',
   '-include', 'config-util.h',
   '-include', 'config-store.h',
   '-include', 'config-expr.h',
diff --git a/tests/unit/libfetchers/meson.build b/tests/unit/libfetchers/meson.build
index b4bc77a97801..0775e8dab676 100644
--- a/tests/unit/libfetchers/meson.build
+++ b/tests/unit/libfetchers/meson.build
@@ -37,7 +37,7 @@ add_project_arguments(
   # It would be nice for our headers to be idempotent instead.
   '-include', 'config-util.hh',
   '-include', 'config-store.hh',
-  '-include', 'config-store.hh',
+  '-include', 'config-expr.hh',
   language : 'cpp',
 )