diff --git a/js/src/jit/IonMacroAssembler.cpp b/js/src/jit/IonMacroAssembler.cpp
index 2ce52b166bf2..fe5494379a37 100644
--- a/js/src/jit/IonMacroAssembler.cpp
+++ b/js/src/jit/IonMacroAssembler.cpp
@@ -1961,9 +1961,10 @@ MacroAssembler::spsMarkJit(SPSProfiler *p, Register framePtr, Register temp)
     // and won't be regenerated when SPS state changes.
     spsProfileEntryAddressSafe(p, 0, temp, &stackFull);
 
+    // Push a C++ frame with non-copy label
     storePtr(ImmPtr(enterJitLabel), Address(temp, ProfileEntry::offsetOfLabel()));
     storePtr(framePtr,              Address(temp, ProfileEntry::offsetOfSpOrScript()));
-    store32(Imm32(ProfileEntry::NullPCOffset), Address(temp, ProfileEntry::offsetOfLineOrPc()));
+    store32(Imm32(0),               Address(temp, ProfileEntry::offsetOfLineOrPc()));
     store32(Imm32(ProfileEntry::IS_CPP_ENTRY), Address(temp, ProfileEntry::offsetOfFlags()));
 
     /* Always increment the stack size, whether or not we actually pushed. */
diff --git a/js/src/jit/IonMacroAssembler.h b/js/src/jit/IonMacroAssembler.h
index 4d609be9b65d..daa1568aac15 100644
--- a/js/src/jit/IonMacroAssembler.h
+++ b/js/src/jit/IonMacroAssembler.h
@@ -1086,10 +1086,11 @@ class MacroAssembler : public MacroAssemblerSpecific
         Label stackFull;
         spsProfileEntryAddress(p, 0, temp, &stackFull);
 
+        // Push a JS frame with a copy label
         storePtr(ImmPtr(str), Address(temp, ProfileEntry::offsetOfLabel()));
         storePtr(ImmGCPtr(s), Address(temp, ProfileEntry::offsetOfSpOrScript()));
         store32(Imm32(ProfileEntry::NullPCOffset), Address(temp, ProfileEntry::offsetOfLineOrPc()));
-        store32(Imm32(0), Address(temp, ProfileEntry::offsetOfFlags()));
+        store32(Imm32(ProfileEntry::FRAME_LABEL_COPY), Address(temp, ProfileEntry::offsetOfFlags()));
 
         /* Always increment the stack size, whether or not we actually pushed. */
         bind(&stackFull);
@@ -1104,6 +1105,7 @@ class MacroAssembler : public MacroAssemblerSpecific
         Label stackFull;
         spsProfileEntryAddressSafe(p, 0, temp, &stackFull);
 
+        // Push a JS frame with a copy label
         loadPtr(str, temp2);
         storePtr(temp2, Address(temp, ProfileEntry::offsetOfLabel()));
 
@@ -1114,7 +1116,7 @@ class MacroAssembler : public MacroAssemblerSpecific
         // (See probes::EnterScript, which calls spsProfiler.enter, which pushes an entry
         //  with 0 pcIdx).
         store32(Imm32(0), Address(temp, ProfileEntry::offsetOfLineOrPc()));
-        store32(Imm32(0), Address(temp, ProfileEntry::offsetOfFlags()));
+        store32(Imm32(ProfileEntry::FRAME_LABEL_COPY), Address(temp, ProfileEntry::offsetOfFlags()));
 
         /* Always increment the stack size, whether or not we actually pushed. */
         bind(&stackFull);