diff --git a/src/cpp/ripple/AccountSetTransactor.h b/src/cpp/ripple/AccountSetTransactor.h
index 160192161..2eeddc53f 100644
--- a/src/cpp/ripple/AccountSetTransactor.h
+++ b/src/cpp/ripple/AccountSetTransactor.h
@@ -1,3 +1,6 @@
+#ifndef ACCOUNTSETTRANSACTOR_H
+#define ACCOUNTSETTRANSACTOR_H
+
 #include "Transactor.h"
 
 class AccountSetTransactor : public Transactor
@@ -7,5 +10,6 @@ public:
 
 	TER doApply();
 };
+#endif
 
 // vim:ts=4
diff --git a/src/cpp/ripple/OfferCancelTransactor.h b/src/cpp/ripple/OfferCancelTransactor.h
index 0f9a4eb6b..007692a2e 100644
--- a/src/cpp/ripple/OfferCancelTransactor.h
+++ b/src/cpp/ripple/OfferCancelTransactor.h
@@ -1,3 +1,6 @@
+#ifndef OFFERCANCELTRANSACTOR_H
+#define OFFERCANCELTRANSACTOR_H
+
 #include "Transactor.h"
 
 class OfferCancelTransactor : public Transactor
@@ -7,5 +10,6 @@ public:
 
 	TER doApply();
 };
+#endif
 
 // vim:ts=4
diff --git a/src/cpp/ripple/RegularKeySetTransactor.h b/src/cpp/ripple/RegularKeySetTransactor.h
index 7d2fc53fe..564965ff4 100644
--- a/src/cpp/ripple/RegularKeySetTransactor.h
+++ b/src/cpp/ripple/RegularKeySetTransactor.h
@@ -1,3 +1,6 @@
+#ifndef REGULARKEYSETTRANSACTOR_H
+#define REGULARKEYSETTRANSACTOR_H
+
 #include "Transactor.h"
 
 class RegularKeySetTransactor : public Transactor
@@ -8,5 +11,6 @@ public:
 	TER checkFee();
 	TER doApply();
 };
+#endif
 
 // vim:ts=4
diff --git a/src/cpp/ripple/TrustSetTransactor.h b/src/cpp/ripple/TrustSetTransactor.h
index ec6cdcd1d..240059e06 100644
--- a/src/cpp/ripple/TrustSetTransactor.h
+++ b/src/cpp/ripple/TrustSetTransactor.h
@@ -1,3 +1,6 @@
+#ifndef TRUSTSETTRANSACTOR_H
+#define TRUSTSETTRANSACTOR_H
+
 #include "Transactor.h"
 
 class TrustSetTransactor : public Transactor
@@ -7,5 +10,6 @@ public:
 	
 	TER doApply();
 };
+#endif
 
 // vim:ts=4