Index: /issm/trunk-jpl/src/c/shared/Numerics/isnan.h
===================================================================
--- /issm/trunk-jpl/src/c/shared/Numerics/isnan.h	(revision 13781)
+++ /issm/trunk-jpl/src/c/shared/Numerics/isnan.h	(revision 13782)
@@ -12,5 +12,6 @@
 #endif
 
-#include <cmath>
+/*If include cmath instead of math, isnan on linux64 murdo does not work: */
+#include <math.h>
 
 template <class T> int xIsNan(const T& X) {
@@ -23,5 +24,7 @@
 
 #if defined(_HAVE_ADOLC_) && !defined(_WRAPPERS_)
-template <> int xIsNan<adouble> (const adouble& X);
+template <> int xIsNan<adouble> (const adouble& X) {
+  return isnan(X.getValue());
+}
 #endif