diff --git a/stm32-data-gen/src/rcc.rs b/stm32-data-gen/src/rcc.rs
index d8cbc32..f0eb457 100644
--- a/stm32-data-gen/src/rcc.rs
+++ b/stm32-data-gen/src/rcc.rs
@@ -379,7 +379,7 @@ impl PeripheralToClock {
         }
 
         // Absolute fallback, match against the clocks for just the first ADC
-        if clocks.contains_key("ADC1") {
+        if peri_name == "ADC" && clocks.contains_key("ADC1") {
             return clocks.get("ADC1");
         }