diff --git a/.changes/unreleased/Breaking-20250623-180015.yaml b/.changes/unreleased/Breaking-20250623-180015.yaml
new file mode 100644
index 00000000000..85bb02441c0
--- /dev/null
+++ b/.changes/unreleased/Breaking-20250623-180015.yaml
@@ -0,0 +1,7 @@
+kind: Breaking
+body: |
+    Changed incorrect `sweep` option name to `sweepSize`
+time: 2025-06-23T18:00:15.18961196+01:00
+custom:
+    Author: jedevc
+    PR: "10560"
diff --git a/docs/static/reference/engine.schema.json b/docs/static/reference/engine.schema.json
index cb604b6690e..3583f004030 100644
--- a/docs/static/reference/engine.schema.json
+++ b/docs/static/reference/engine.schema.json
@@ -79,7 +79,7 @@
           "$ref": "#/$defs/DiskSpace",
           "description": "MinFreeSpace is the target amount of free disk space the garbage collector will attempt to leave. However, it will never let the available space fall below ReservedSpace."
         },
-        "sweep": {
+        "sweepSize": {
           "$ref": "#/$defs/DiskSpace",
           "description": "SweepSize is the minimum amount of space to sweep during a single gc pass. Either an absolute number of bytes, or a percentage of the \"allowed space\" between reserved and max."
         },
@@ -123,7 +123,7 @@
           "$ref": "#/$defs/DiskSpace",
           "description": "MinFreeSpace is the target amount of free disk space the garbage collector will attempt to leave. However, it will never let the available space fall below ReservedSpace."
         },
-        "sweep": {
+        "sweepSize": {
           "$ref": "#/$defs/DiskSpace",
           "description": "SweepSize is the minimum amount of space to sweep during a single gc pass. Either an absolute number of bytes, or a percentage of the \"allowed space\" between reserved and max."
         }
diff --git a/engine/config/config.go b/engine/config/config.go
index 930a03d2736..25b0b84abce 100644
--- a/engine/config/config.go
+++ b/engine/config/config.go
@@ -127,7 +127,7 @@ type GCSpace struct {
 	// SweepSize is the minimum amount of space to sweep during a single gc pass.
 	// Either an absolute number of bytes, or a percentage of the "allowed
 	// space" between reserved and max.
-	SweepSize DiskSpace `json:"sweep,omitempty"`
+	SweepSize DiskSpace `json:"sweepSize,omitempty"`
 }
 
 func (space *GCSpace) IsUnset() bool {