diff --git a/mongoose.c b/mongoose.c
index acadaff8..5efe7855 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -1331,7 +1331,6 @@ void mg_iobuf_free(struct mg_iobuf *io) {
 static void mg_log_stdout(const void *buf, int len, void *userdata) {
   (void) userdata;
   fwrite(buf, 1, len, stdout);
-  fflush(stdout);
 }
 
 static const char *s_spec = "2";
diff --git a/src/log.c b/src/log.c
index 78c4be08..8761371e 100644
--- a/src/log.c
+++ b/src/log.c
@@ -7,7 +7,6 @@
 static void mg_log_stdout(const void *buf, int len, void *userdata) {
   (void) userdata;
   fwrite(buf, 1, len, stdout);
-  fflush(stdout);
 }
 
 static const char *s_spec = "2";