diff --git a/configure b/configure
index ce76653..fba6de2 100755
--- a/configure
+++ b/configure
@@ -6891,7 +6891,7 @@ fi
 $as_echo "$libc_cv_gnu89_inline" >&6; }
 if test $libc_cv_gnu89_inline = yes; then
   libc_cv_gnu89_inline=-fgnu89-inline
-else
+elif test $libc_cv_gnu89_inline = no; then
   libc_cv_gnu89_inline=
 fi
 
diff --git a/configure.in b/configure.in
index 182c683..b867371 100644
--- a/configure.in
+++ b/configure.in
@@ -1777,7 +1777,7 @@ fi
 rm -f conftest*])
 if test $libc_cv_gnu89_inline = yes; then
   libc_cv_gnu89_inline=-fgnu89-inline
-else
+elif test $libc_cv_gnu89_inline = no; then
   libc_cv_gnu89_inline=
 fi
 AC_SUBST(libc_cv_gnu89_inline)