diff --git a/changelog.txt b/changelog.txt
index d482e86..231555b 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -6,6 +6,7 @@ Date: tba
     - Moved hot air glassware from py science 1 unlock to hot air unlock. Resolves https://github.com/pyanodon/pybugreports/issues/811
     - Bitumen extractors no longer show "disabled by script" and instead shows a custom status explaining that it requires drilling fluid.
     - Removed all legacy low-res graphic files from pyanodon.
+    - Pumpjacks are no longer flippable. Resolves https://github.com/pyanodon/pybugreports/issues/786
 ---------------------------------------------------------------------------------------------------
 Version: 3.0.10
 Date: 2025-1-2
diff --git a/prototypes/buildings/pumpjack-mk01.lua b/prototypes/buildings/pumpjack-mk01.lua
index 0168c4d..2ff9dad 100644
--- a/prototypes/buildings/pumpjack-mk01.lua
+++ b/prototypes/buildings/pumpjack-mk01.lua
@@ -40,7 +40,6 @@ ENTITY {
     dying_explosion = "big-explosion",
     collision_box = {{-2.9, -2.9}, {2.9, 2.9}},
     selection_box = {{-3.0, -3.0}, {3.0, 3.0}},
-    forced_symmetry = "diagonal-pos",
     module_slots = 1,
     allowed_effects = {"speed", "consumption"},
     crafting_categories = {"pumpjack"},
diff --git a/prototypes/buildings/pumpjack-mk02.lua b/prototypes/buildings/pumpjack-mk02.lua
index bf86d80..e0779f3 100644
--- a/prototypes/buildings/pumpjack-mk02.lua
+++ b/prototypes/buildings/pumpjack-mk02.lua
@@ -40,7 +40,6 @@ ENTITY {
     dying_explosion = "big-explosion",
     collision_box = {{-3.4, -3.4}, {3.4, 3.4}},
     selection_box = {{-3.5, -3.5}, {3.5, 3.5}},
-    forced_symmetry = "diagonal-pos",
     module_slots = 2,
     allowed_effects = {"speed", "consumption"},
     crafting_categories = {"pumpjack"},
diff --git a/prototypes/buildings/pumpjack-mk03.lua b/prototypes/buildings/pumpjack-mk03.lua
index cbe7632..c71e3cb 100644
--- a/prototypes/buildings/pumpjack-mk03.lua
+++ b/prototypes/buildings/pumpjack-mk03.lua
@@ -40,7 +40,6 @@ ENTITY {
     dying_explosion = "big-explosion",
     collision_box = {{-4.4, -4.4}, {4.4, 4.4}},
     selection_box = {{-4.5, -4.5}, {4.5, 4.5}},
-    forced_symmetry = "diagonal-pos",
     module_slots = 3,
     allowed_effects = {"speed", "consumption"},
     crafting_categories = {"pumpjack"},
diff --git a/prototypes/buildings/pumpjack-mk04.lua b/prototypes/buildings/pumpjack-mk04.lua
index 67db522..30f13cc 100644
--- a/prototypes/buildings/pumpjack-mk04.lua
+++ b/prototypes/buildings/pumpjack-mk04.lua
@@ -40,7 +40,6 @@ ENTITY {
     dying_explosion = "big-explosion",
     collision_box = {{-5.4, -5.4}, {5.4, 5.4}},
     selection_box = {{-5.5, -5.5}, {5.5, 5.5}},
-    forced_symmetry = "diagonal-pos",
     module_slots = 4,
     allowed_effects = {"speed", "consumption"},
     crafting_categories = {"pumpjack"},