diff --git a/util/mkdef.pl b/util/mkdef.pl
index dc5b12b904..4c15a942d2 100755
--- a/util/mkdef.pl
+++ b/util/mkdef.pl
@@ -833,14 +833,14 @@ sub do_defs
 			} elsif (/\(\*(\w*(\{[0-9]+\})?)\([^\)]+/) {
 				$s = $1;
 				print STDERR "DEBUG: found ANSI C function $s\n" if $debug;
-			} elsif (/\w+\W+(\w+)\W*\(\s*\)$/s) {
+			} elsif (/\w+\W+(\w+)\W*\(\s*\)(\s*__attribute__\(.*\)\s*)?$/s) {
 				# K&R C
 				print STDERR "DEBUG: found K&R C function $s\n" if $debug;
 				next;
-			} elsif (/\w+\W+\w+(\{[0-9]+\})?\W*\(.*\)$/s) {
-				while (not /\(\)$/s) {
-					s/[^\(\)]*\)$/\)/s;
-					s/\([^\(\)]*\)\)$/\)/s;
+			} elsif (/\w+\W+\w+(\{[0-9]+\})?\W*\(.*\)(\s*__attribute__\(.*\)\s*)?$/s) {
+				while (not /\(\)(\s*__attribute__\(.*\)\s*)?$/s) {
+					s/[^\(\)]*\)(\s*__attribute__\(.*\)\s*)?$/\)/s;
+					s/\([^\(\)]*\)\)(\s*__attribute__\(.*\)\s*)?$/\)/s;
 				}
 				s/\(void\)//;
 				/(\w+(\{[0-9]+\})?)\W*\(\)/s;
diff --git a/util/mkerr.pl b/util/mkerr.pl
index f1178602ef..cf34a35ce1 100644
--- a/util/mkerr.pl
+++ b/util/mkerr.pl
@@ -128,20 +128,20 @@ while (($hdr, $lib) = each %libinc)
 	    s/^[\n\s]*//g;
 	    s/[\n\s]*$//g;
 	    next if(/typedef\W/);
-	    if (/\(\*(\w*)\([^\)]+/) {
+	    if (/\(\*(\w*)\([^\)]+\)(\s*__attribute__\(.*\)\s*)?$/) {
 		my $name = $1;
 		$name =~ tr/[a-z]/[A-Z]/;
 		$ftrans{$name} = $1;
-	    } elsif (/\w+\W+(\w+)\W*\(\s*\)$/s){
+	    } elsif (/\w+\W+(\w+)\W*\(\s*\)(\s*__attribute__\(.*\)\s*)?$/s){
 		# K&R C
 		next ;
-	    } elsif (/\w+\W+\w+\W*\(.*\)$/s) {
-		while (not /\(\)$/s) {
-		    s/[^\(\)]*\)$/\)/s;
-		    s/\([^\(\)]*\)\)$/\)/s;
+	    } elsif (/\w+\W+\w+\W*\(.*\)(\s*__attribute__\(.*\)\s*)?$/s) {
+		while (not /\(\)(\s*__attribute__\(.*\)\s*)?$/s) {
+		    s/[^\(\)]*\)(\s*__attribute__\(.*\)\s*)?$/\)/s;
+		    s/\([^\(\)]*\)\)(\s*__attribute__\(.*\)\s*)?$/\)/s;
 		}
 		s/\(void\)//;
-		/(\w+)\W*\(\)/s;
+		/(\w+(\{[0-9]+\})?)\W*\(\)/s;
 		my $name = $1;
 		$name =~ tr/[a-z]/[A-Z]/;
 		$ftrans{$name} = $1;