diff --git a/Makefile.in b/Makefile.in
index 8bcc5713..1ee1fdb1 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,3 +1,5 @@
+SHELL       := @SHELL@
+
 # Support out-of-tree builds
 srcdir      := @srcdir@
 VPATH       := @srcdir@
diff --git a/man/Makefile.in b/man/Makefile.in
index a619cd59..13c1a748 100644
--- a/man/Makefile.in
+++ b/man/Makefile.in
@@ -1,3 +1,5 @@
+SHELL       := @SHELL@
+
 # Support out-of-tree builds
 VPATH       := @srcdir@
 
diff --git a/modules/Makefile.in b/modules/Makefile.in
index 9ea2d87a..e8b12c75 100644
--- a/modules/Makefile.in
+++ b/modules/Makefile.in
@@ -1,3 +1,5 @@
+SHELL       := @SHELL@
+
 # Support out-of-tree builds
 srcdir      := @srcdir@
 VPATH       := @srcdir@