diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
index f7984aae..e9fe5c35 100644
--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -639,7 +639,7 @@ static enum TIFFReadDirEntryErr TIFFReadDirEntryFloat(TIFF* tif, TIFFDirEntry* d
 				err=TIFFReadDirEntryCheckedDouble(tif,direntry,&m);
 				if (err!=TIFFReadDirEntryErrOk)
 					return(err);
-				if ((m > FLT_MAX) || (m < FLT_MIN))
+				if ((m > FLT_MAX) || (m < -FLT_MAX))
 					return(TIFFReadDirEntryErrRange);
 				*value=(float)m;
 				return(TIFFReadDirEntryErrOk);