diff --git a/winsup/w32api/lib/Makefile.in b/winsup/w32api/lib/Makefile.in
index 1127fb227..00225a5dd 100644
--- a/winsup/w32api/lib/Makefile.in
+++ b/winsup/w32api/lib/Makefile.in
@@ -44,7 +44,7 @@ ifneq (,$(findstring cygwin,$(target_alias)))
 inst_includedir:=$(tooldir)/include/w32api
 inst_libdir:=$(tooldir)/lib/w32api
 else
-ifneq (,$with_cross_host)
+ifneq (,$(with_cross_host))
 inst_includedir:=$(tooldir)/include/w32api
 inst_libdir:=$(tooldir)/lib
 else
diff --git a/winsup/w32api/lib/ddk/Makefile.in b/winsup/w32api/lib/ddk/Makefile.in
index c7c5cdde7..80b148c2a 100644
--- a/winsup/w32api/lib/ddk/Makefile.in
+++ b/winsup/w32api/lib/ddk/Makefile.in
@@ -40,7 +40,7 @@ ifneq (,$(findstring cygwin,$(target_alias)))
 inst_includedir:=$(tooldir)/include/w32api/ddk
 inst_libdir:=$(tooldir)/lib/w32api
 else
-ifneq (,$with_cross_host)
+ifneq (,$(with_cross_host))
 inst_includedir:=$(tooldir)/include/w32api/ddk
 inst_libdir:=$(tooldir)/lib
 else
diff --git a/winsup/w32api/lib/directx/Makefile.in b/winsup/w32api/lib/directx/Makefile.in
index 1d1074285..a56c398d5 100644
--- a/winsup/w32api/lib/directx/Makefile.in
+++ b/winsup/w32api/lib/directx/Makefile.in
@@ -40,7 +40,7 @@ ifneq (,$(findstring cygwin,$(target_alias)))
 inst_includedir:=$(tooldir)/include/w32api
 inst_libdir:=$(tooldir)/lib/w32api
 else
-ifneq (,$with_cross_host)
+ifneq (,$(with_cross_host))
 inst_includedir:=$(tooldir)/include/w32api
 inst_libdir:=$(tooldir)/lib
 else