diff --git a/etc/spack/defaults/modules.yaml b/etc/spack/defaults/modules.yaml
index 8864a76547a7c28687d4ceb092bd689b904ecd55..25fe2088e7e0f0654c07fd7189fb2381179a60dd 100644
--- a/etc/spack/defaults/modules.yaml
+++ b/etc/spack/defaults/modules.yaml
@@ -24,6 +24,8 @@ modules:
       - MANPATH
     share/man:
       - MANPATH
+    share/aclocal:
+      - ACLOCAL_PATH
     lib:
       - LIBRARY_PATH
       - LD_LIBRARY_PATH