diff --git a/libpuzzle.spec b/libpuzzle.spec
index ce1227b..8ff76d7 100644
--- a/libpuzzle.spec
+++ b/libpuzzle.spec
@@ -73,7 +73,7 @@ iconv -f iso8859-1 -t utf-8 php-plain/examples/similar/similar.php > similar.php
 cd php/libpuzzle
 phpize
 
-%if %{__isa_bits} == 64
+%if 0%{?__isa_bits} == 64
 LDFLAGS="$LDFLAGS -L%{_builddir}/%{name}-%{version}/usr/lib64"; export LDFLAGS
 %endif