diff --git a/src/common/sysutils.cpp b/src/common/sysutils.cpp
index 49e2914..c5779b6 100644
--- a/src/common/sysutils.cpp
+++ b/src/common/sysutils.cpp
@@ -152,7 +152,7 @@ system_is_multiprocessor()
 
 #ifdef _WIN32
 
-void gettimeofday(struct timeval *tv, void *tz)
+void gettimeofday(struct timeval *tv, void * /* tz */)
 {
     union { 
 	long long ns100;  
diff --git a/src/common/sysutils.h b/src/common/sysutils.h
index 334917d..5c6212f 100644
--- a/src/common/sysutils.h
+++ b/src/common/sysutils.h
@@ -45,8 +45,12 @@
 #  define R__
 #endif
 
+#ifdef _MSC_VER
+#pragma warning(disable:4127; disable:4244; disable:4267)
+#else
 #pragma GCC diagnostic ignored "-Wconversion"
 #pragma clang diagnostic ignored "-Wconversion"
+#endif
 
 #ifdef __clang__
 #  define RTENTRY__ __attribute__((annotate("realtime")))
diff --git a/src/ext/getopt/getopt.c b/src/ext/getopt/getopt.c
index ce9abb3..1ca7d77 100644
--- a/src/ext/getopt/getopt.c
+++ b/src/ext/getopt/getopt.c
@@ -35,6 +35,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifdef _MSC_VER
+#pragma warning (disable: 4131; disable: 4706)
+#endif
+
 int	opterr = 1,		/* if error message should be printed */
 	optind = 1,		/* index into parent argv vector */
 	optopt,			/* character checked for validity */
diff --git a/src/ext/getopt/getopt_long.c b/src/ext/getopt/getopt_long.c
index 1f92449..f5cd244 100644
--- a/src/ext/getopt/getopt_long.c
+++ b/src/ext/getopt/getopt_long.c
@@ -54,6 +54,10 @@
 #include <stdio.h>
 #include <stdarg.h>
 
+#ifdef _MSC_VER
+#pragma warning (disable: 4131; disable: 4996)
+#endif
+
 GETOPT_API extern char opterrmsg[128];
 char opterrmsg[128]; /* last error message is stored here */
 
diff --git a/src/faster/StretcherChannelData.cpp b/src/faster/StretcherChannelData.cpp
index 640ddb4..8cbe423 100644
--- a/src/faster/StretcherChannelData.cpp
+++ b/src/faster/StretcherChannelData.cpp
@@ -89,8 +89,7 @@ R2Stretcher::ChannelData::construct(const std::set<size_t> &sizes,
 
     unityResetLow = 16000.f;
 
-    for (std::set<size_t>::const_iterator i = sizes.begin();
-         i != sizes.end(); ++i) {
+    for (i = sizes.begin(); i != sizes.end(); ++i) {
         ffts[*i] = new FFT(*i);
         if (sizeof(process_t) == sizeof(double)) {
             ffts[*i]->initDouble();
diff --git a/src/finer/R3Stretcher.cpp b/src/finer/R3Stretcher.cpp
index ea1b2c8..81524b9 100644
--- a/src/finer/R3Stretcher.cpp
+++ b/src/finer/R3Stretcher.cpp
@@ -1006,7 +1006,7 @@ R3Stretcher::consume(bool final)
 
     while (true) {
 
-        Profiler profiler("R3Stretcher::consume/loop");
+        Profiler profiler2("R3Stretcher::consume/loop");
 
         int readSpace = cd0->inbuf->getReadSpace();
         m_log.log(2, "consume: read space", readSpace);