diff --git a/src/abi/mod.rs b/src/abi/mod.rs
index 2466bfe60c7a..2c99597922e8 100644
--- a/src/abi/mod.rs
+++ b/src/abi/mod.rs
@@ -65,7 +65,11 @@ pub(crate) fn conv_to_call_conv(sess: &Session, c: Conv, default_call_conv: Call
             sess.dcx().fatal("C-cmse-nonsecure-entry call conv is not yet implemented");
         }
 
-        Conv::Msp430Intr | Conv::PtxKernel | Conv::AvrInterrupt | Conv::AvrNonBlockingInterrupt => {
+        Conv::Msp430Intr
+        | Conv::PtxKernel
+        | Conv::GpuKernel
+        | Conv::AvrInterrupt
+        | Conv::AvrNonBlockingInterrupt => {
             unreachable!("tried to use {c:?} call conv which only exists on an unsupported target");
         }
     }