diff --git a/src/test/fuzz/psbt.cpp b/src/test/fuzz/psbt.cpp
index de0f706243..b932385e1c 100644
--- a/src/test/fuzz/psbt.cpp
+++ b/src/test/fuzz/psbt.cpp
@@ -46,6 +46,7 @@ FUZZ_TARGET(psbt)
         (void)PSBTInputSigned(input);
         (void)input.IsNull();
     }
+    (void)CountPSBTUnsignedInputs(psbt);
 
     for (const PSBTOutput& output : psbt.outputs) {
         (void)output.IsNull();