diff --git a/builder/hyperv/common/ssh.go b/builder/hyperv/common/ssh.go
index 50db23ac2..182d154ff 100644
--- a/builder/hyperv/common/ssh.go
+++ b/builder/hyperv/common/ssh.go
@@ -42,8 +42,9 @@ func SSHConfigFunc(config *SSHConfig) func(multistep.StateBag) (*gossh.ClientCon
 		}
 
 		return &gossh.ClientConfig{
-			User: config.Comm.SSHUsername,
-			Auth: auth,
+			User:            config.Comm.SSHUsername,
+			Auth:            auth,
+			HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 		}, nil
 	}
 }
diff --git a/builder/null/ssh.go b/builder/null/ssh.go
index 3c31df5cc..7af2b55d7 100644
--- a/builder/null/ssh.go
+++ b/builder/null/ssh.go
@@ -50,6 +50,7 @@ func SSHConfig(username string, password string, privateKeyFile string) func(mul
 					gossh.KeyboardInteractive(
 						ssh.PasswordKeyboardInteractive(password)),
 				},
+				HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 			}, nil
 		}
 	}
diff --git a/builder/oneandone/ssh.go b/builder/oneandone/ssh.go
index 8f1856a8e..33fe0cc01 100644
--- a/builder/oneandone/ssh.go
+++ b/builder/oneandone/ssh.go
@@ -41,7 +41,8 @@ func sshConfig(state multistep.StateBag) (*gossh.ClientConfig, error) {
 		auth = append(auth, gossh.PublicKeys(signer))
 	}
 	return &gossh.ClientConfig{
-		User: config.Comm.SSHUsername,
-		Auth: auth,
+		User:            config.Comm.SSHUsername,
+		Auth:            auth,
+		HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 	}, nil
 }
diff --git a/builder/profitbricks/ssh.go b/builder/profitbricks/ssh.go
index 7069a77ba..a40959cc7 100644
--- a/builder/profitbricks/ssh.go
+++ b/builder/profitbricks/ssh.go
@@ -41,7 +41,8 @@ func sshConfig(state multistep.StateBag) (*gossh.ClientConfig, error) {
 		auth = append(auth, gossh.PublicKeys(signer))
 	}
 	return &gossh.ClientConfig{
-		User: config.Comm.SSHUsername,
-		Auth: auth,
+		User:            config.Comm.SSHUsername,
+		Auth:            auth,
+		HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 	}, nil
 }
diff --git a/builder/qemu/ssh.go b/builder/qemu/ssh.go
index 83c923f67..1881613fd 100644
--- a/builder/qemu/ssh.go
+++ b/builder/qemu/ssh.go
@@ -35,7 +35,8 @@ func sshConfig(state multistep.StateBag) (*gossh.ClientConfig, error) {
 	}
 
 	return &gossh.ClientConfig{
-		User: config.Comm.SSHUsername,
-		Auth: auth,
+		User:            config.Comm.SSHUsername,
+		Auth:            auth,
+		HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 	}, nil
 }
diff --git a/builder/virtualbox/common/ssh.go b/builder/virtualbox/common/ssh.go
index 5316a1c31..b09c0cc47 100644
--- a/builder/virtualbox/common/ssh.go
+++ b/builder/virtualbox/common/ssh.go
@@ -36,8 +36,9 @@ func SSHConfigFunc(config SSHConfig) func(multistep.StateBag) (*gossh.ClientConf
 		}
 
 		return &gossh.ClientConfig{
-			User: config.Comm.SSHUsername,
-			Auth: auth,
+			User:            config.Comm.SSHUsername,
+			Auth:            auth,
+			HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 		}, nil
 	}
 }
diff --git a/builder/vmware/common/ssh.go b/builder/vmware/common/ssh.go
index c03a4e2df..0d94599f8 100644
--- a/builder/vmware/common/ssh.go
+++ b/builder/vmware/common/ssh.go
@@ -84,8 +84,9 @@ func SSHConfigFunc(config *SSHConfig) func(multistep.StateBag) (*gossh.ClientCon
 		}
 
 		return &gossh.ClientConfig{
-			User: config.Comm.SSHUsername,
-			Auth: auth,
+			User:            config.Comm.SSHUsername,
+			Auth:            auth,
+			HostKeyCallback: gossh.InsecureIgnoreHostKey(),
 		}, nil
 	}
 }