diff --git a/frontend/lib/api/types/non-generated.ts b/frontend/lib/api/types/non-generated.ts
index 3970f1859..752236b1f 100644
--- a/frontend/lib/api/types/non-generated.ts
+++ b/frontend/lib/api/types/non-generated.ts
@@ -60,7 +60,7 @@ export interface QueryFilterJSONPart {
 }
 
 export type StandardizedUnitType
-  = | "fluid ounce"
+  = | "fluid_ounce"
     | "cup"
     | "ounce"
     | "pound"
diff --git a/frontend/pages/group/data/units.vue b/frontend/pages/group/data/units.vue
index 08abeed49..635d936d8 100644
--- a/frontend/pages/group/data/units.vue
+++ b/frontend/pages/group/data/units.vue
@@ -459,7 +459,7 @@ export default defineNuxtComponent({
     const standardUnitItems = computed<StandardUnitItem[]>(() => [
       {
         title: i18n.t("data-pages.units.standard-unit-labels.fluid-ounce"),
-        value: "fluid ounce",
+        value: "fluid_ounce",
       },
       {
         title: i18n.t("data-pages.units.standard-unit-labels.cup"),
diff --git a/mealie/schema/recipe/recipe_ingredient.py b/mealie/schema/recipe/recipe_ingredient.py
index 06c95bfb1..64d7da513 100644
--- a/mealie/schema/recipe/recipe_ingredient.py
+++ b/mealie/schema/recipe/recipe_ingredient.py
@@ -43,7 +43,7 @@ class StandardizedUnitType(StrEnum):
     """
 
     # Imperial
-    FLUID_OUNCE = "fluid ounce"
+    FLUID_OUNCE = "fluid_ounce"
     CUP = "cup"
 
     OUNCE = "ounce"
diff --git a/mealie/services/parser_services/parser_utils/unit_utils.py b/mealie/services/parser_services/parser_utils/unit_utils.py
index 30fa1d85d..ef73e7e29 100644
--- a/mealie/services/parser_services/parser_utils/unit_utils.py
+++ b/mealie/services/parser_services/parser_utils/unit_utils.py
@@ -121,7 +121,7 @@ def merge_quantity_and_unit[T: CreateIngredientUnit](
 
     uc = UnitConverter()
 
-    # pre-process units to account for ounce -> fluid ounce conversion
+    # pre-process units to account for ounce -> fluid_ounce conversion
     unit_1_standard = uc.parse(unit_1.standard_unit, strict=True)
     unit_2_standard = uc.parse(unit_2.standard_unit, strict=True)
     unit_1_standard, unit_2_standard = uc._resolve_ounce(unit_1_standard, unit_2_standard)