diff --git a/SNAPLib/AlignerContext.cpp b/SNAPLib/AlignerContext.cpp
index 89c16f26..bdd3dc65 100644
--- a/SNAPLib/AlignerContext.cpp
+++ b/SNAPLib/AlignerContext.cpp
@@ -376,7 +376,7 @@ AlignerContext::printStats()
         (stats->filtered > 0) ? numPctAndPad(filtered, stats->filtered, 100.0 * stats->filtered / stats->totalReads, 23, strBufLen) : "",
         (stats->extraAlignments > 0) ? FormatUIntWithCommas(stats->extraAlignments, extraAlignments, strBufLen) : "",
 		isPaired() ? pctAndPad(pctPairs,  100.0 * stats->alignedAsPairs / stats->totalReads, 7, strBufLen) : "",
-		FormatUIntWithCommas((unsigned _int64)(1000 * stats->totalReads / max(alignTime, (_int64)1)), readsPerSecond, strBufLen),	// Aligntime is in ms
+		FormatUIntWithCommas((_uint64)(1000 * stats->totalReads / max(alignTime, (_int64)1)), readsPerSecond, strBufLen),	// Aligntime is in ms
 		FormatUIntWithCommas((alignTime + 500) / 1000, alignTimeString, strBufLen)
 		);
 
diff --git a/SNAPLib/Compat.cpp b/SNAPLib/Compat.cpp
index c74e7491..aa3e34bf 100644
--- a/SNAPLib/Compat.cpp
+++ b/SNAPLib/Compat.cpp
@@ -219,7 +219,7 @@ bool WaitForEventWithTimeout(EventObject *eventObject, _int64 timeoutInMillis)
 
 void BindThreadToProcessor(unsigned processorNumber) // This hard binds a thread to a processor.  You can no-op it at some perf hit.
 {
-    if (!SetThreadAffinityMask(GetCurrentThread(),((unsigned _int64)1) << processorNumber)) {
+    if (!SetThreadAffinityMask(GetCurrentThread(),((_uint64)1) << processorNumber)) {
         WriteErrorMessage("Binding thread to processor %d failed, %d\n",processorNumber,GetLastError());
     }
 }
diff --git a/SNAPLib/LandauVishkin.cpp b/SNAPLib/LandauVishkin.cpp
index a68512d3..e6f8de32 100644
--- a/SNAPLib/LandauVishkin.cpp
+++ b/SNAPLib/LandauVishkin.cpp
@@ -51,7 +51,7 @@ bool writeCigar(char** o_buf, int* o_buflen, int count, char code, CigarFormat f
         }
         int written = snprintf(*o_buf, *o_buflen, "%d%c", count, code);
         if (written > *o_buflen - 1) {
-            *o_buf = '\0';
+            **o_buf = '\0';
             return false;
         } else {
             *o_buf += written;