diff --git a/scripts/csv.py b/scripts/csv.py
index ad756840..702de7fb 100755
--- a/scripts/csv.py
+++ b/scripts/csv.py
@@ -1129,7 +1129,7 @@ class CsvExpr:
                 p.chomp()
 
             # floats
-            elif p.match('[+-]?(?:[_0-9]*\.[_0-9eE]*|nan)'):
+            elif p.match('[+-]?(?:[_0-9]*\.(?:[_0-9]|[eE][+-]?)*|nan)'):
                 a = CsvExpr.FloatLit(CsvFloat(p.chomp()))
 
             # ints