1 files changed, 2 insertions, 2 deletions
diff --git a/iso646.h b/iso646.h
index d68f021..2e40179 100644
--- a/iso646.h
+++ b/iso646.h
@@ -27,8 +27,8 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
-#if !(defined __STDC_VERSION__ && 199409 <= __STDC_VERSION__)
-#	error <iso646.h> requires C95 or higher
+#if !(defined __STDC_VERSION__ && 199409L <= __STDC_VERSION__)
+# error <iso646.h> requires C95 or higher
 #endif
 
 #define and                                                                   &&