diff --git a/js/src/jit/IonBuilder.cpp b/js/src/jit/IonBuilder.cpp
index 53ce4bccbe7a..925fad292d85 100644
--- a/js/src/jit/IonBuilder.cpp
+++ b/js/src/jit/IonBuilder.cpp
@@ -813,7 +813,7 @@ IonBuilder::build()
                 script()->filename(), script()->lineno(), (void*)script(),
                 AnalysisModeString(info().analysisMode()));
     } else {
-        JitSpew(JitSpew_IonScripts, "%sompiling script %s:%" PRIuSIZE " (%p) (warmup-counter=%" PRIu32 ", level=%s)",
+        JitSpew(JitSpew_IonScripts, "%sompiling script %s:%" PRIuSIZE " (%p) (warmup-counter=%" PRIuSIZE ", level=%s)",
                 (script()->hasIonScript() ? "Rec" : "C"),
                 script()->filename(), script()->lineno(), (void*)script(),
                 script()->getWarmUpCount(), OptimizationLevelString(optimizationInfo().level()));