diff --git a/components/bootloader_support/src/bootloader_clock.c b/components/bootloader_support/src/bootloader_clock.c
index 24267cc32..9980a0278 100644
--- a/components/bootloader_support/src/bootloader_clock.c
+++ b/components/bootloader_support/src/bootloader_clock.c
@@ -59,3 +59,12 @@ void bootloader_clock_configure()
     }
 #endif
 }
+
+#ifdef BOOTLOADER_BUILD
+
+int esp_clk_apb_freq(void)
+{
+    return rtc_clk_apb_freq_get();
+}
+
+#endif // BOOTLOADER_BUILD