diff --git a/src/model_objects/component.rs b/src/model_objects/component.rs
index 5f9b0dff..a9a74138 100644
--- a/src/model_objects/component.rs
+++ b/src/model_objects/component.rs
@@ -433,7 +433,7 @@ impl Declarations {
     }
 
     pub fn get_clock_count(&self) -> usize {
-        self.clocks.len()
+        self.clocks.values().collect::<HashSet<_>>().len()
     }
 
     pub fn set_clock_indices(&mut self, start_index: ClockIndex) {