diff --git a/ext/hbsdctl.rb/hbsdctl.c b/ext/hbsdctl.rb/hbsdctl.c
index ec93208..a7e662b 100644
--- a/ext/hbsdctl.rb/hbsdctl.c
+++ b/ext/hbsdctl.rb/hbsdctl.c
@@ -43,7 +43,10 @@ feature_set(VALUE self, VALUE path, VALUE state)
   if (r == 0) {
     return Qtrue;
   } else {
-    return Qfalse;
+    VALUE rb_mBSD = rb_const_get(rb_cObject, rb_intern("BSD")),
+          rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
+          rb_eError = rb_const_get(rb_mControl, rb_intern("Error"));
+    rb_raise(rb_eError, "hbsdcontrol_set_feature_state failed");
   }
 }
 
diff --git a/lib/bsd/control/feature.rb b/lib/bsd/control/feature.rb
index 8185920..335aed5 100644
--- a/lib/bsd/control/feature.rb
+++ b/lib/bsd/control/feature.rb
@@ -8,10 +8,13 @@ module BSD::Control
     end
 
     ##
-    # Enables a feature for a given binary.
+    # Enables a feature for a given executable.
     #
     # @param [String] path
-    #  The path to a binary.
+    #  The path to an executable.
+    #
+    # @raise [BSD::Control::Error]
+    #  When the operation fails.
     #
     # @return [Boolean]
     #  Returns true on success.
@@ -20,10 +23,13 @@ module BSD::Control
     end
 
     ##
-    # Disables a feature for a given binary.
+    # Disables a feature for a given executable.
     #
     # @param [String] path
-    #  The path to a binary.
+    #  The path to an executable.
+    #
+    # @raise [BSD::Control::Error]
+    #  When the operation fails.
     #
     # @return [Boolean]
     #  Returns true on success.