diff --git a/FRP/FRPPhotoDetailViewController.m b/FRP/FRPPhotoDetailViewController.m
index 741dca6..34020eb 100644
--- a/FRP/FRPPhotoDetailViewController.m
+++ b/FRP/FRPPhotoDetailViewController.m
@@ -87,7 +87,7 @@
     [RACObserve(self.viewModel, voteButtonText) subscribeNext:^(id value) {
             [voteButton setTitle:value forState:UIControlStateNormal];
     }];
-    voteButton.rac_command = [[RACCommand alloc] initWithEnabled:self.viewModel.ableToVoteSignal signalBlock:^RACSignal *(id input) {
+    voteButton.rac_command = [[RACCommand alloc] initWithEnabled:self.viewModel.voteCommand.enabled signalBlock:^RACSignal *(id input) {
         // Assume that we're logged in at first. We'll replace this signal later if not.
         RACSignal *authSignal = [RACSignal empty];
         
diff --git a/FRP/FRPPhotoDetailViewModel.h b/FRP/FRPPhotoDetailViewModel.h
index 9e8ebe9..4f8b304 100644
--- a/FRP/FRPPhotoDetailViewModel.h
+++ b/FRP/FRPPhotoDetailViewModel.h
@@ -24,6 +24,5 @@
 @property (nonatomic, readonly) RACCommand *voteCommand;
 
 @property (nonatomic, readonly) BOOL loggedIn;
-@property (nonatomic, readonly) RACSignal *ableToVoteSignal;
 
 @end
diff --git a/FRP/FRPPhotoDetailViewModel.m b/FRP/FRPPhotoDetailViewModel.m
index 1e85642..b2de2c6 100644
--- a/FRP/FRPPhotoDetailViewModel.m
+++ b/FRP/FRPPhotoDetailViewModel.m
@@ -25,8 +25,6 @@
 
 @property (nonatomic, strong) RACCommand *voteCommand;
 
-@property (nonatomic, strong) RACSignal *ableToVoteSignal;
-
 @end
 
 @implementation FRPPhotoDetailViewModel
@@ -51,14 +49,11 @@
     }];
     
     @weakify(self);
-    self.voteCommand = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
-        
+    self.voteCommand = [[RACCommand alloc] initWithEnabled:[RACObserve(self.photoModel, votedFor) not] signalBlock:^RACSignal *(id input) {
         @strongify(self);
         return [FRPPhotoImporter voteForPhoto:self.photoModel];
     }];
     
-    self.ableToVoteSignal = [RACObserve(self.photoModel, votedFor) not];
-    
     return self;
 }