diff --git a/miner.h b/miner.h
index 5fb53a6..efdb81b 100644
--- a/miner.h
+++ b/miner.h
@@ -20,6 +20,8 @@ extern "C" {
 #define strncasecmp(x,y,z) _strnicmp(x,y,z)
 #define strcasecmp(x,y) _stricmp(x,y)
 typedef int ssize_t;
+#undef HAVE_ALLOCA_H
+#undef HAVE_SYSLOG_H
 #endif
 
 #ifdef STDC_HEADERS
@@ -30,6 +32,7 @@ typedef int ssize_t;
 #  include <stdlib.h>
 # endif
 #endif
+
 #ifdef HAVE_ALLOCA_H
 # include <alloca.h>
 #elif !defined alloca
diff --git a/x11/cuda_x11_simd512.cu b/x11/cuda_x11_simd512.cu
index b1950c6..0d161c7 100644
--- a/x11/cuda_x11_simd512.cu
+++ b/x11/cuda_x11_simd512.cu
@@ -178,7 +178,9 @@ X(j) = (u-v) << (2*n); \
 __device__ __forceinline__ void FFT_16(int *y) {
 
 #if __CUDA_ARCH__ < 300
-#warning FFT_16() function is not compatible with SM 2.1 devices!
+#ifndef WIN32
+# warning FFT_16() function is not compatible with SM 2.1 devices!
+#endif
 #endif
 
   /*
@@ -345,7 +347,9 @@ __device__ __forceinline__ void Expansion(const uint32_t *data, uint4 *g_temp4)
 {
   int i;
 #if __CUDA_ARCH__ < 300
-#warning Expansion() function is not compatible with SM 2.1 Devices
+#ifndef WIN32
+# warning Expansion() function is not compatible with SM 2.1 devices
+#endif
 #endif
 
   /* Message Expansion using Number Theoretical Transform similar to FFT */