diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index 489e09a15..1fb93da11 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -78,10 +78,16 @@
 #include "tusb_debug.h"
 
 //--------------------------------------------------------------------+
-// Optional API implemented by application if needed
+// API implemented by application if needed
 // TODO move to a more obvious place/file
 //--------------------------------------------------------------------+
 
+// Get current milliseconds, required by some port/configuration without RTOS
+extern uint32_t tusb_time_millis_api(void);
+
+// Delay in milliseconds, use tusb_time_millis_api() by default. required by some port/configuration with no RTOS
+extern void tusb_time_delay_ms_api(uint32_t ms);
+
 // flush data cache
 TU_ATTR_WEAK extern void tusb_app_dcache_flush(uintptr_t addr, uint32_t data_size);
 
diff --git a/src/portable/synopsys/dwc2/dwc2_stm32.h b/src/portable/synopsys/dwc2/dwc2_stm32.h
index 5f2b8419c..672891561 100644
--- a/src/portable/synopsys/dwc2/dwc2_stm32.h
+++ b/src/portable/synopsys/dwc2/dwc2_stm32.h
@@ -233,6 +233,9 @@ static inline void dwc2_phy_init(dwc2_regs_t* dwc2, uint8_t hs_phy_type) {
 
       // Enable PLL internal PHY
       USB_HS_PHYC->USB_HS_PHYC_PLL |= USB_HS_PHYC_PLL_PLLEN;
+
+      // Wait ~2ms until the PLL is ready (there's no RDY bit to query)
+      tusb_time_delay_ms_api(2);
       #else
 
       #endif
diff --git a/src/tusb.h b/src/tusb.h
index e794a8b0b..92da845c0 100644
--- a/src/tusb.h
+++ b/src/tusb.h
@@ -170,16 +170,6 @@ bool tusb_deinit(uint8_t rhport);
 
 #endif
 
-//--------------------------------------------------------------------+
-// API Implemented by user
-//--------------------------------------------------------------------+
-
-// Get current milliseconds, required by some port/configuration without RTOS
-uint32_t tusb_time_millis_api(void);
-
-// Delay in milliseconds, use tusb_time_millis_api() by default. required by some port/configuration with no RTOS
-void tusb_time_delay_ms_api(uint32_t ms);
-
 #ifdef __cplusplus
  }
 #endif