4 files changed, 24 insertions, 1 deletions
diff --git a/src/auxiliaryFunctions/isnan/cisnans.c b/src/auxiliaryFunctions/isnan/cisnans.c
index 527ff21a..7fc0759f 100644
--- a/src/auxiliaryFunctions/isnan/cisnans.c
+++ b/src/auxiliaryFunctions/isnan/cisnans.c
@@ -10,7 +10,15 @@
  *
  */
 
-#include "isnan.h"
+
+
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan((double)x)
+#endif
+
+#include "isnan.h"
+
 
 float	cisnans(floatComplex in) {
   if ((int)(isnan(creals(in))) && (int)(isnan(cimags(in)))) return 1;
diff --git a/src/auxiliaryFunctions/isnan/disnans.c b/src/auxiliaryFunctions/isnan/disnans.c
index 981cbae4..0d0a5699 100644
--- a/src/auxiliaryFunctions/isnan/disnans.c
+++ b/src/auxiliaryFunctions/isnan/disnans.c
@@ -10,6 +10,11 @@
  *
  */
 
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan((double)x)
+#endif
+
 #include "isnan.h"
 
 double	disnans(double in) {
diff --git a/src/auxiliaryFunctions/isnan/sisnans.c b/src/auxiliaryFunctions/isnan/sisnans.c
index cd646cd8..07d56538 100644
--- a/src/auxiliaryFunctions/isnan/sisnans.c
+++ b/src/auxiliaryFunctions/isnan/sisnans.c
@@ -10,6 +10,11 @@
  *
  */
 
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan((double)x)
+#endif
+
 #include "isnan.h"
 
 float	sisnans(float in) {
diff --git a/src/auxiliaryFunctions/isnan/zisnans.c b/src/auxiliaryFunctions/isnan/zisnans.c
index a2b1a0a4..b7ebc1bb 100644
--- a/src/auxiliaryFunctions/isnan/zisnans.c
+++ b/src/auxiliaryFunctions/isnan/zisnans.c
@@ -10,6 +10,11 @@
  *
  */
 
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan((double)x)
+#endif
+
 #include "isnan.h"
 
 double	zisnans(doubleComplex in) {