diff --git a/xpcom/libxpt/xptinfo/src/nsInterfaceInfo.h b/xpcom/libxpt/xptinfo/src/nsInterfaceInfo.h
index b3f57537a37..5510ab2a186 100644
--- a/xpcom/libxpt/xptinfo/src/nsInterfaceInfo.h
+++ b/xpcom/libxpt/xptinfo/src/nsInterfaceInfo.h
@@ -34,7 +34,7 @@
 
 class nsInterfaceInfo : public nsIInterfaceInfo
 {
-    NS_DECL_ISUPPORTS;
+    NS_DECL_ISUPPORTS
 
     NS_IMETHOD GetName(char** name); // returns IAllocatator alloc'd copy
     NS_IMETHOD GetIID(nsIID** iid);  // returns IAllocatator alloc'd copy
diff --git a/xpcom/libxpt/xptinfo/src/nsInterfaceInfoManager.h b/xpcom/libxpt/xptinfo/src/nsInterfaceInfoManager.h
index 85554cb839e..561948a7dc0 100644
--- a/xpcom/libxpt/xptinfo/src/nsInterfaceInfoManager.h
+++ b/xpcom/libxpt/xptinfo/src/nsInterfaceInfoManager.h
@@ -36,7 +36,7 @@
 
 class nsInterfaceInfoManager : public nsIInterfaceInfoManager
 {
-    NS_DECL_ISUPPORTS;
+    NS_DECL_ISUPPORTS
 
     // nsIInformationInfo management services
     NS_IMETHOD GetInfoForIID(const nsIID* iid, nsIInterfaceInfo** info);
diff --git a/xpcom/reflect/xptinfo/src/nsInterfaceInfo.h b/xpcom/reflect/xptinfo/src/nsInterfaceInfo.h
index b3f57537a37..5510ab2a186 100644
--- a/xpcom/reflect/xptinfo/src/nsInterfaceInfo.h
+++ b/xpcom/reflect/xptinfo/src/nsInterfaceInfo.h
@@ -34,7 +34,7 @@
 
 class nsInterfaceInfo : public nsIInterfaceInfo
 {
-    NS_DECL_ISUPPORTS;
+    NS_DECL_ISUPPORTS
 
     NS_IMETHOD GetName(char** name); // returns IAllocatator alloc'd copy
     NS_IMETHOD GetIID(nsIID** iid);  // returns IAllocatator alloc'd copy
diff --git a/xpcom/reflect/xptinfo/src/nsInterfaceInfoManager.h b/xpcom/reflect/xptinfo/src/nsInterfaceInfoManager.h
index 85554cb839e..561948a7dc0 100644
--- a/xpcom/reflect/xptinfo/src/nsInterfaceInfoManager.h
+++ b/xpcom/reflect/xptinfo/src/nsInterfaceInfoManager.h
@@ -36,7 +36,7 @@
 
 class nsInterfaceInfoManager : public nsIInterfaceInfoManager
 {
-    NS_DECL_ISUPPORTS;
+    NS_DECL_ISUPPORTS
 
     // nsIInformationInfo management services
     NS_IMETHOD GetInfoForIID(const nsIID* iid, nsIInterfaceInfo** info);