diff --git a/wasi/CMakeLists.txt b/wasi/CMakeLists.txt
index be9eb4c..b49d8ae 100644
--- a/wasi/CMakeLists.txt
+++ b/wasi/CMakeLists.txt
@@ -22,7 +22,7 @@ include(CheckSymbolExists)
 check_symbol_exists(strndup string.h HAVE_STRNDUP)
 check_symbol_exists(fcntl fcntl.h HAVE_FCNTL)
 check_symbol_exists(lstat "sys/stat.h" HAVE_LSTAT)
-check_symbol_exists(getentropy unistd.h HAVE_GETENTROPY)
+check_symbol_exists(getentropy "unistd.h;sys/random.h" HAVE_GETENTROPY)
 
 include(CheckStructHasMember)
 check_struct_has_member("struct timespec" tv_sec time.h HAVE_TIMESPEC)
diff --git a/wasi/wasi.c b/wasi/wasi.c
index 4e59b17..dcdcd12 100644
--- a/wasi/wasi.c
+++ b/wasi/wasi.c
@@ -58,6 +58,16 @@ struct timespec {
 #include <sys/uio.h>
 #endif /* HAS_SYSUIO */
 
+#if HAS_GETENTROPY && defined(__APPLE__)
+#include <AvailabilityMacros.h>
+#ifndef MAC_OS_X_VERSION_10_12
+#define MAC_OS_X_VERSION_10_12 101200
+#endif
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12
+#include <sys/random.h>
+#endif
+#endif
+
 #ifndef __MSL__
 #include <sys/stat.h>
 #endif