diff --git a/libs/evoral/src/ControlList.cpp b/libs/evoral/src/ControlList.cpp
index a095daa135..18803af348 100644
--- a/libs/evoral/src/ControlList.cpp
+++ b/libs/evoral/src/ControlList.cpp
@@ -16,6 +16,11 @@
  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+// 'std::isnan()' is not available in MSVC.
+#ifndef COMPILER_MSVC
+using std::isnan;
+#endif
+
 #include <cmath>
 #include <cassert>
 #include <utility>
@@ -812,7 +817,7 @@ ControlList::modify (iterator iter, double when, double val)
 		(*iter)->when = when;
 		(*iter)->value = val;
 
-		if (std::isnan (val)) {
+		if (isnan (val)) {
 			abort ();
 		}