diff --git a/m4/ax_boost_base.m4 b/m4/ax_boost_base.m4

index 2bce5194..d5403957 100644

--- a/m4/ax_boost_base.m4

+++ b/m4/ax_boost_base.m4

@@ -33,7 +33,7 @@

 #   and this notice are preserved. This file is offered as-is, without any

 #   warranty.

-#serial 43

+#serial 45

 # example boost program (need to pass version)

 m4_define([_AX_BOOST_BASE_PROGRAM],

@@ -113,7 +113,7 @@ AC_DEFUN([_AX_BOOST_BASE_RUNDETECT],[

     dnl are found, e.g. when only header-only libraries are installed!

     AS_CASE([${host_cpu}],

       [x86_64],[libsubdirs="lib64 libx32 lib lib64"],

-      [ppc64|s390x|sparc64|aarch64|ppc64le],[libsubdirs="lib64 lib lib64"],

+      [ppc64|powerpc64|s390x|sparc64|aarch64|ppc64le|powerpc64le|riscv64|e2k],[libsubdirs="lib64 lib lib64"],

       [libsubdirs="lib"]

     )