--- a/ofstd/libsrc/ofwhere.c
+++ b/ofstd/libsrc/ofwhere.c
@@ -33,5 +33,5 @@

-#if defined(__linux__) || defined(__CYGWIN__)
+#if defined(__linux__) || defined(__CYGWIN__) || defined(__EMSCRIPTEN__)
 #undef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE
 #elif defined(__APPLE__)
@@ -166,5 +166,5 @@
 }

-#elif defined(__linux__) || defined(__CYGWIN__) || defined(__sun) || defined(WAI_USE_PROC_SELF_EXE)
+#elif defined(__linux__) || defined(__CYGWIN__) || defined(__sun) || defined(WAI_USE_PROC_SELF_EXE) || defined(__EMSCRIPTEN__)

 #include <stdio.h>