diff --git a/gcc/ada/gcc-interface/Makefile.in b/gcc/ada/gcc-interface/Makefile.in
index b851683f13f..4fd368283a9 100644
--- a/gcc/ada/gcc-interface/Makefile.in
+++ b/gcc/ada/gcc-interface/Makefile.in
@@ -2190,7 +2190,7 @@ ifeq ($(strip $(filter-out %x32 linux%,$(target_cpu) $(target_os))),)
 endif
 
 # Darwin (Mac OS X)
-ifeq ($(strip $(filter-out darwin%,$(target_cpu))),)
+ifeq ($(strip $(filter-out darwin%,$(target_os))),)
   SO_OPTS = -shared-libgcc
   LIBGNAT_TARGET_PAIRS = \
     a-intnam.ads<a-intnam-darwin.ads \