diff --git a/src/runtime/c/pgf/data.h b/src/runtime/c/pgf/data.h
index ac066e4c1..b3ad9846f 100644
--- a/src/runtime/c/pgf/data.h
+++ b/src/runtime/c/pgf/data.h
@@ -16,6 +16,10 @@
 #include <sys/errno.h>
 #endif
 
+#ifdef EMSCRIPTEN
+#include <errno.h>
+#include <stdio.h>
+#endif
 
 class PGF_INTERNAL_DECL pgf_error : public std::runtime_error {
 public:
diff --git a/src/runtime/c/pgf/pgf.h b/src/runtime/c/pgf/pgf.h
index 9dac796bb..a60e22f27 100644
--- a/src/runtime/c/pgf/pgf.h
+++ b/src/runtime/c/pgf/pgf.h
@@ -132,6 +132,9 @@ typedef struct {
 #elif defined(_WIN32)
 #define LINT_BASE 1000000000
 #define LINT_BASE_LOG 9
+#elif defined(EMSCRIPTEN)
+#define LINT_BASE 10000000000000000000UL
+#define LINT_BASE_LOG 19
 #else
 #error "Unsupported platform"
 #endif