diff --git a/lib/ProfileData/InstrProfReader.cpp b/lib/ProfileData/InstrProfReader.cpp
index 089dfca07f0..16a69cb5457 100644
--- a/lib/ProfileData/InstrProfReader.cpp
+++ b/lib/ProfileData/InstrProfReader.cpp
@@ -423,11 +423,11 @@ Error RawInstrProfReader<IntPtrT>::readRawCounts(
 
   // Check bounds. Note that the counter pointer embedded in the data record
   // may itself be corrupt.
-  if (NumCounters > MaxNumCounters)
+  if (MaxNumCounters < 0 || NumCounters > (uint32_t)MaxNumCounters)
     return error(instrprof_error::malformed);
   ptrdiff_t CounterOffset = getCounterOffset(CounterPtr);
   if (CounterOffset < 0 || CounterOffset > MaxNumCounters ||
-      (CounterOffset + NumCounters) > MaxNumCounters)
+      ((uint32_t)CounterOffset + NumCounters) > (uint32_t)MaxNumCounters)
     return error(instrprof_error::malformed);
 
   auto RawCounts = makeArrayRef(getCounter(CounterOffset), NumCounters);