diff --git a/src/parser3.h b/src/parser3.h
index 5ed7c4b..973b85e 100644
--- a/src/parser3.h
+++ b/src/parser3.h
@@ -654,7 +654,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex2(Parser3 *self) {
   } else if (self->utf8Codepoint < 0x800) {
     bool useTmp = self->buf - self->writeBuf < 2;
     char *p = tmp;
-    if (useTmp) {
+    if (useTmp) [[unlikely]] {
       self->flushString(false);
     }
     auto &w = useTmp ? p : self->writeBuf;
@@ -662,7 +662,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex2(Parser3 *self) {
     self->utf8Codepoint >>= 6;
     w[0] = (0b00011111 & self->utf8Codepoint) | 0b11000000;
     w += 2;
-    if (useTmp) {
+    if (useTmp) [[unlikely]] {
       self->callbacks->on_string_data(self->userdata, tmp, 2, false);
     }
   } else {
@@ -680,7 +680,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex2(Parser3 *self) {
     }
     bool useTmp = self->buf - self->writeBuf < 3;
     char *p = tmp;
-    if (useTmp) {
+    if (useTmp) [[unlikely]] {
       self->flushString(false);
     }
     auto &w = useTmp ? p : self->writeBuf;
@@ -690,7 +690,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex2(Parser3 *self) {
     self->utf8Codepoint >>= 6;
     w[0] = (0b00001111 & self->utf8Codepoint) | 0b11100000;
     w += 3;
-    if (useTmp) {
+    if (useTmp) [[unlikely]] {
       self->callbacks->on_string_data(self->userdata, tmp, 3, false);
     }
   }
@@ -730,7 +730,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex3(Parser3 *self) {
   }
   bool useTmp = self->buf - self->writeBuf < 4;
   char *p = tmp;
-  if (useTmp) {
+  if (useTmp) [[unlikely]] {
     self->flushString(false);
   }
   auto &w = useTmp ? p : self->writeBuf;
@@ -742,7 +742,7 @@ inline PRESERVE_NONE WeaselJsonStatus t_hex3(Parser3 *self) {
   self->utf8Codepoint >>= 6;
   w[0] = (0b00000111 & self->utf8Codepoint) | 0b11110000;
   w += 4;
-  if (useTmp) {
+  if (useTmp) [[unlikely]] {
     self->callbacks->on_string_data(self->userdata, tmp, 4, false);
   }