diff --git a/js/src/ion/IonBuilder.cpp b/js/src/ion/IonBuilder.cpp
index fa1eb575959..23ae3c4040e 100644
--- a/js/src/ion/IonBuilder.cpp
+++ b/js/src/ion/IonBuilder.cpp
@@ -254,7 +254,7 @@ IonBuilder::build()
     if (!current)
         return false;
 
-    IonSpew(IonSpew_MIR, "Analyzing script %s:%d (%p)",
+    IonSpew(IonSpew_Scripts, "Analyzing script %s:%d (%p)",
             script->filename, script->lineno, (void *) script);
 
     if (!initParameters())
@@ -374,7 +374,7 @@ bool
 IonBuilder::buildInline(IonBuilder *callerBuilder, MResumePoint *callerResumePoint,
                         MDefinition *thisDefn, MDefinitionVector &argv)
 {
-    IonSpew(IonSpew_MIR, "Inlining script %s:%d (%p)",
+    IonSpew(IonSpew_Scripts, "Inlining script %s:%d (%p)",
             script->filename, script->lineno, (void *)script);
 
     callerBuilder_ = callerBuilder;
diff --git a/js/src/ion/IonSpewer.cpp b/js/src/ion/IonSpewer.cpp
index b7ece3d2b64..1d7d88c02c3 100644
--- a/js/src/ion/IonSpewer.cpp
+++ b/js/src/ion/IonSpewer.cpp
@@ -171,6 +171,7 @@ ion::CheckLogging()
             "usage: IONFLAGS=option,option,option,... where options can be:\n"
             "\n"
             "  aborts     Compilation abort messages\n"
+            "  scripts    Compiled scripts\n"
             "  mir        MIR information\n"
             "  alias      Alias analysis\n"
             "  gvn        Global Value Numbering\n"
@@ -195,6 +196,8 @@ ion::CheckLogging()
         EnableChannel(IonSpew_Abort);
     if (ContainsFlag(env, "alias"))
         EnableChannel(IonSpew_Alias);
+    if (ContainsFlag(env, "scripts"))
+        EnableChannel(IonSpew_Scripts);
     if (ContainsFlag(env, "mir"))
         EnableChannel(IonSpew_MIR);
     if (ContainsFlag(env, "gvn"))
diff --git a/js/src/ion/IonSpewer.h b/js/src/ion/IonSpewer.h
index d80e3707792..8c78e319beb 100644
--- a/js/src/ion/IonSpewer.h
+++ b/js/src/ion/IonSpewer.h
@@ -20,6 +20,8 @@ namespace ion {
 #define IONSPEW_CHANNEL_LIST(_)             \
     /* Used to abort SSA construction */    \
     _(Abort)                                \
+    /* Information about compiled scripts */\
+    _(Scripts)                              \
     /* Information during MIR building */   \
     _(MIR)                                  \
     /* Information during alias analysis */ \