diff --git a/.gitignore b/.gitignore
index 1b2211d..4b19e33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 build*
+vcpkg_installed/
+
diff --git a/src/beison.cpp b/src/beison.cpp
index 0dc3d38..ebff6c8 100644
--- a/src/beison.cpp
+++ b/src/beison.cpp
@@ -6,6 +6,7 @@
 #include <charconv>
 #include <regex>
 #include <utility>
+#include <cmath>
 
 namespace beison
 {
@@ -249,7 +250,7 @@ namespace beison
 	}
 	Value Value::number(double d) noexcept
 	{
-		if (!isfinite(d)) std::abort();
+		if (!std::isfinite(d)) std::abort();
 		Value val;
 		val.underlying_ = std::make_unique<ValueImpl>(ValueKindConstant<VK::Number>(), d);
 		return val;
diff --git a/vcpkg-configuration.json b/vcpkg-configuration.json
new file mode 100644
index 0000000..47eee29
--- /dev/null
+++ b/vcpkg-configuration.json
@@ -0,0 +1,15 @@
+{
+    "default-registry": {
+        "kind": "git",
+        "repository": "https://github.com/microsoft/vcpkg",
+        "baseline": "0da9fe986d07603da71f35ef8dd55512154a64bd"
+    },
+    "registries": [
+        {
+            "kind": "git",
+            "repository": "https://github.com/northwindtraders/vcpkg-registry",
+            "baseline": "dacf4de488094a384ca2c202b923ccc097956e0c",
+            "packages": [ "beicode" ]
+        }
+    ]
+}