diff --git a/mongoose.c b/mongoose.c
index 1c236204..cf679e0f 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -4245,7 +4245,7 @@ void mg_random(void *buf, size_t len) {
   while (len--) *p++ = (unsigned char) (esp_random() & 255);
   done = true;
 #elif MG_ARCH == MG_ARCH_WIN32
-#elif MG_ARCH_UNIX
+#elif MG_ARCH == MG_ARCH_UNIX
   FILE *fp = fopen("/dev/urandom", "rb");
   if (fp != NULL) {
     if (fread(buf, 1, len, fp) == len) done = true;
diff --git a/src/util.c b/src/util.c
index 3caffd7b..646d847f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -70,7 +70,7 @@ void mg_random(void *buf, size_t len) {
   while (len--) *p++ = (unsigned char) (esp_random() & 255);
   done = true;
 #elif MG_ARCH == MG_ARCH_WIN32
-#elif MG_ARCH_UNIX
+#elif MG_ARCH == MG_ARCH_UNIX
   FILE *fp = fopen("/dev/urandom", "rb");
   if (fp != NULL) {
     if (fread(buf, 1, len, fp) == len) done = true;