3 files changed, 21 insertions, 0 deletions
diff --git a/src/objc/abstract/MCOAbstractPart.h b/src/objc/abstract/MCOAbstractPart.h
index e9febdc0..f3986af1 100644
--- a/src/objc/abstract/MCOAbstractPart.h
+++ b/src/objc/abstract/MCOAbstractPart.h
@@ -109,4 +109,11 @@ namespace mailcore {
 
 @end
 
+@interface MCOAbstractPart (MCOUnavailable)
+
+/** Do not invoke this directly. */
+- (id) init NS_UNAVAILABLE;
+
+@end
+
 #endif
diff --git a/src/objc/provider/MCOMailProvider.h b/src/objc/provider/MCOMailProvider.h
index 85a23a8d..2a568016 100644
--- a/src/objc/provider/MCOMailProvider.h
+++ b/src/objc/provider/MCOMailProvider.h
@@ -84,3 +84,10 @@
 - (NSString *) importantFolderPath;
 
 @end
+
+@interface MCOMailProvider (MCOUnavailable)
+
+/** Do not invoke this directly. */
+- (id) init NS_UNAVAILABLE;
+
+@end
diff --git a/src/objc/provider/MCONetService.h b/src/objc/provider/MCONetService.h
index eb198e5e..af0f3d14 100644
--- a/src/objc/provider/MCONetService.h
+++ b/src/objc/provider/MCONetService.h
@@ -39,3 +39,10 @@
 - (NSString *) hostnameWithEmail:(NSString *)email;
 
 @end
+
+@interface MCONetService (MCOUnavailable)
+
+/** Do not invoke this directly. */
+- (id) init NS_UNAVAILABLE;
+
+@end