Fix thinko

diff --git a/lib/sqlalchemy/dialects/postgresql/ranges.py b/lib/sqlalchemy/dialects/postgresql/ranges.py
index a8863ba05ae961e0e2500414b1a1cd90b4485db0..80e157a65375da5382843f976e38e1c67dc9969c 100644 (file)
--- a/lib/sqlalchemy/dialects/postgresql/ranges.py
+++ b/lib/sqlalchemy/dialects/postgresql/ranges.py
@@ -174,7 +174,7 @@ class Range(Generic[_T]):
             # "Normalize" the two edges as '[)', to simplify successive logic
             if value1_is_lower_bound:
                 if not value1_inc:
-                    value1 -= step
+                    value1 += step
                     value1_inc = True
             else:
                 if value1_inc:
@@ -182,7 +182,7 @@ class Range(Generic[_T]):
                     value1_inc = False
             if value2_is_lower_bound:
                 if not value2_inc:
-                    value2 -= step
+                    value2 += step
                     value2_inc = True
             else:
                 if value2_inc: