diff --git a/portable/GCC/RX700v3_DPFPU/port.c b/portable/GCC/RX700v3_DPFPU/port.c
index 51ce77727..41bc7d426 100644
--- a/portable/GCC/RX700v3_DPFPU/port.c
+++ b/portable/GCC/RX700v3_DPFPU/port.c
@@ -29,6 +29,8 @@
 * Implementation of functions defined in portable.h for the RXv3 DPFPU port.
 *----------------------------------------------------------*/
 
+#warning Testing for DFPU support in this port is not yet complete
+
 /* Scheduler includes. */
 #include "FreeRTOS.h"
 #include "task.h"
diff --git a/portable/IAR/RX700v3_DPFPU/port.c b/portable/IAR/RX700v3_DPFPU/port.c
index fc0446419..51b75ceeb 100644
--- a/portable/IAR/RX700v3_DPFPU/port.c
+++ b/portable/IAR/RX700v3_DPFPU/port.c
@@ -29,6 +29,8 @@
 * Implementation of functions defined in portable.h for the RXv3 DPFPU port.
 *----------------------------------------------------------*/
 
+#warning Testing for DFPU support in this port is not yet complete
+
 /* Scheduler includes. */
 #include "FreeRTOS.h"
 #include "task.h"
diff --git a/portable/Renesas/RX700v3_DPFPU/port.c b/portable/Renesas/RX700v3_DPFPU/port.c
index 5010eaad4..9f6d3ee33 100644
--- a/portable/Renesas/RX700v3_DPFPU/port.c
+++ b/portable/Renesas/RX700v3_DPFPU/port.c
@@ -29,6 +29,8 @@
 * Implementation of functions defined in portable.h for the RXv3 DPFPU port.
 *----------------------------------------------------------*/
 
+#warning Testing for DFPU support in this port is not yet complete
+
 /* Scheduler includes. */
 #include "FreeRTOS.h"
 #include "task.h"