diff --git a/libimagerror/src/trace.rs b/libimagerror/src/trace.rs
index 3cb4e78b..58a0b945 100644
--- a/libimagerror/src/trace.rs
+++ b/libimagerror/src/trace.rs
@@ -77,7 +77,7 @@ fn print_trace_maxdepth(idx: u64, e: &Error, max: u64) -> Option<&Error> {
 
 /// Count errors in `Error::cause()` recursively
 fn count_error_causes(e: &Error) -> u64 {
-    1 + if e.cause().is_some() { count_error_causes(e.cause().unwrap()) } else { 0 }
+    1 + e.cause().map(|c| count_error_causes(c)).unwrap_or(0)
 }
 
 fn print_trace_dbg(idx: u64, e: &Error) {