2 files changed, 10 insertions, 0 deletions
diff --git a/src/node.c b/src/node.c
index 061903bc..065ff875 100644
--- a/src/node.c
+++ b/src/node.c
@@ -22,6 +22,11 @@
 #include <math.h>
 #include <float.h>
 
+#ifdef _WIN32
+#    define isnan(x) _isnan(x)
+#    define isinf(x) (!_finite(x))
+#endif
+
 SERD_API
 SerdNode
 serd_node_from_string(SerdType type, const uint8_t* buf)
diff --git a/tests/serd_test.c b/tests/serd_test.c
index 5e37824c..259f244a 100644
--- a/tests/serd_test.c
+++ b/tests/serd_test.c
@@ -25,6 +25,11 @@
 
 #define USTR(s) ((const uint8_t*)(s))
 
+#ifdef _WIN32
+#    define INFINITY (DBL_MAX + DBL_MAX)
+#    define NAN      (INFINITY - INFINITY)
+#endif
+
 static int
 failure(const char* fmt, ...)
 {