diff --git a/scripts/intsym.pl b/scripts/intsym.pl
index 04326b6a..86dbf694 100644
--- a/scripts/intsym.pl
+++ b/scripts/intsym.pl
@@ -62,8 +62,10 @@ for my $i (@instances)
 			if(/^([^\s\(#][^\(]*)\s\*?([a-z][a-z_0-9]+)\s*\(/)
 			{
 				# Skip preprocessing/comment stuff and official API.
-				unless($1 =~ '^#' or $1 =~ '/\*' or $2 =~ $apiex or $1 =~ /\bstatic\b/)
+				unless($1 =~ '^#' or $1 =~ '/[/\*]' or $2 =~ $apiex or $1 =~ /\bstatic\b/)
 				{
+					die "second definition of $2 in $header\n"
+						if grep {$_ eq $2} @symbols;
 					push(@symbols, $2) unless grep {$_ eq $2} (keys %{$i->{conditional}});
 				}
 			}
diff --git a/src/intsym.h b/src/intsym.h
index 1959ced7..7e125281 100644
--- a/src/intsym.h
+++ b/src/intsym.h
@@ -8,6 +8,7 @@
 #define pnts INT123_pnts
 #define catchsignal INT123_catchsignal
 #define safe_realloc INT123_safe_realloc
+#define safer_realloc INT123_safer_realloc
 #define compat_strdup INT123_compat_strdup
 #define compat_getenv INT123_compat_getenv
 #define compat_open INT123_compat_open