diff --git a/configure b/configure
index 4d010b7a..9faebcd0 100755
--- a/configure
+++ b/configure
@@ -24301,7 +24301,7 @@ esac
             sed -n 's/^[ 	]*MULFUNC_PROLOGUE(\(.*\))/\1/p' $tmp_file ;
             sed -n 's/^[ 	]*PROLOGUE(\([^,]*\).*)/\1/p' $tmp_file ;
             sed -n 's/^;[ 	]*PROLOGUE(\([^,]*\).*)/\1/p' $tmp_file ;
-            sed -n 's/[^G]*GLOBAL_FUNC[:space:]*\(.*\)/\1/p' $tmp_file ;
+            sed -n 's/[^G]*GLOBAL_FUNC[[:space:]]*\(.*\)/\1/p' $tmp_file ;
           `
           for gmp_tmp in $gmp_ep; do
             cat >>confdefs.h <<_ACEOF
diff --git a/configure.ac b/configure.ac
index bde9f095..170b9e4a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2595,7 +2595,7 @@ for tmp_fn in $gmp_mpn_functions; do
             sed -n 's/^[ 	]*MULFUNC_PROLOGUE(\(.*\))/\1/p' $tmp_file ;
             sed -n 's/^[ 	]*PROLOGUE(\([^,]*\).*)/\1/p' $tmp_file ;
             sed -n 's/^;[ 	]*PROLOGUE(\([^,]*\).*)/\1/p' $tmp_file ;
-            sed -n 's/[^G]*GLOBAL_FUNC[:space:]*\(.*\)/\1/p' $tmp_file ;
+            sed -n 's/[^G]*GLOBAL_FUNC[[:space:]]*\(.*\)/\1/p' $tmp_file ;
           `]
           for gmp_tmp in $gmp_ep; do
             AC_DEFINE_UNQUOTED(HAVE_NATIVE_$gmp_tmp)