diff --git a/qbsp/qbsp.h b/qbsp/qbsp.h
index f8e8ad8b..188e55fb 100644
--- a/qbsp/qbsp.h
+++ b/qbsp/qbsp.h
@@ -23,10 +23,10 @@
 #ifndef QBSP_H
 #define QBSP_H
 
-
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
+#include <float.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>