diff --git a/ethcore/res/ethereum/frontier_like_test.json b/ethcore/res/ethereum/frontier_like_test.json
index ca31927e7..78299bf4e 100644
--- a/ethcore/res/ethereum/frontier_like_test.json
+++ b/ethcore/res/ethereum/frontier_like_test.json
@@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
diff --git a/ethcore/res/ethereum/frontier_like_test_dao_rescue.json b/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
new file mode 100644
index 000000000..ba0881508
--- /dev/null
+++ b/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
@@ -0,0 +1,43 @@
+{
+	"name": "Frontier (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoRescueSoftFork": true
+			}
+		}
+	},
+	"params": {
+		"accountStartNonce": "0x00",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x1"
+	},
+	"genesis": {
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
+		"difficulty": "0x400000000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
+		"gasLimit": "0x1388"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
+	}
+}
diff --git a/ethcore/res/ethereum/frontier_test.json b/ethcore/res/ethereum/frontier_test.json
index 3964d33ad..d12390eb9 100644
--- a/ethcore/res/ethereum/frontier_test.json
+++ b/ethcore/res/ethereum/frontier_test.json
@@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
diff --git a/ethcore/res/ethereum/homestead_test.json b/ethcore/res/ethereum/homestead_test.json
index a0e3df275..6d38c29c0 100644
--- a/ethcore/res/ethereum/homestead_test.json
+++ b/ethcore/res/ethereum/homestead_test.json
@@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0
+				"frontierCompatibilityModeLimit": 0,
+				"daoRescueSoftFork": false
 			}
 		}
 	},
diff --git a/ethcore/res/ethereum/homestead_test_dao_rescue.json b/ethcore/res/ethereum/homestead_test_dao_rescue.json
new file mode 100644
index 000000000..7dbe4b321
--- /dev/null
+++ b/ethcore/res/ethereum/homestead_test_dao_rescue.json
@@ -0,0 +1,43 @@
+{
+	"name": "Homestead (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": 0,
+				"daoRescueSoftFork": true
+			}
+		}
+	},
+	"params": {
+		"accountStartNonce": "0x00",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x1"
+	},
+	"genesis": {
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
+		"difficulty": "0x400000000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
+		"gasLimit": "0x1388"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
+	}
+}
diff --git a/ethcore/res/ethereum/morden.json b/ethcore/res/ethereum/morden.json
index 0cc88ac64..c7836bd91 100644
--- a/ethcore/res/ethereum/morden.json
+++ b/ethcore/res/ethereum/morden.json
@@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar": "",
-				"frontierCompatibilityModeLimit": "0x789b0"
+				"frontierCompatibilityModeLimit": "0x789b0",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
diff --git a/ethcore/res/ethereum/olympic.json b/ethcore/res/ethereum/olympic.json
index 1e0c210b5..86dfc15b7 100644
--- a/ethcore/res/ethereum/olympic.json
+++ b/ethcore/res/ethereum/olympic.json
@@ -9,7 +9,8 @@
 				"durationLimit": "0x08",
 				"blockReward": "0x14D1120D7B160000",
 				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoRescueSoftFork": false
 			}
 		}
 	},