diff --git a/examples/frLiuLayland/frLiuLayland.ino b/examples/frLiuLayland/frLiuLayland.ino
index ec8d7d4..723122b 100644
--- a/examples/frLiuLayland/frLiuLayland.ino
+++ b/examples/frLiuLayland/frLiuLayland.ino
@@ -31,7 +31,7 @@ struct task_t {
 task_t tasks1[] = {{10, 5, 2}, {15, 6, 1}};
 task_t tasks2[] = {{10, 5, 2}, {15, 4, 1}};
 task_t tasks3[] = {{10, 3, 3}, {13, 4, 2}, {17, 4, 1}};
-task_t tasks4[] = {{10, 3, 3}, {13, 4, 2}, {17, 2, 1}};
+task_t tasks4[] = {{10, 3, 3}, {13, 4, 2}, {17, 1, 1}};
 task_t* taskList[] = {tasks1, tasks2, tasks3, tasks4};
 int taskCount[] = {2, 2, 3, 3};
 //------------------------------------------------------------------------------
diff --git a/src/port.c b/src/port.c
index 432f0f0..6857410 100644
--- a/src/port.c
+++ b/src/port.c
@@ -23,6 +23,10 @@
 #endif
 
 #if (__CORTEX_M == 4U)
+#if (__FPU_PRESENT == 0)
+/* Fallback to CM3 port as there is no FPU */
+#include "../portable/GCC/ARM_CM3/port.c"
+#else
 /* MPU not supported */
 #if 0 /*(__MPU_PRESENT == 1)*/
 #include "../portable/GCC/ARM_CM4_MPU/port.c"
@@ -30,6 +34,7 @@
 #include "../portable/GCC/ARM_CM4F/port.c"
 #endif
 #endif
+#endif
 
 #if (__CORTEX_M == 7U)
 /* MPU not supported */
diff --git a/src/portmacro.h b/src/portmacro.h
index 51cd339..f06372c 100644
--- a/src/portmacro.h
+++ b/src/portmacro.h
@@ -28,6 +28,10 @@ inline __attribute__(( always_inline )) static BaseType_t xPortIsInsideInterrupt
 #endif
 
 #if (__CORTEX_M == 4U)
+#if (__FPU_PRESENT == 0)
+/* Fallback to CM3 port as there is no FPU */
+#include "../portable/GCC/ARM_CM3/portmacro.h"
+#else
 /* MPU not supported */
 #if 0 /*(__MPU_PRESENT == 1)*/
 #include "../portable/GCC/ARM_CM4_MPU/portmacro.h"
@@ -35,6 +39,7 @@ inline __attribute__(( always_inline )) static BaseType_t xPortIsInsideInterrupt
 #include "../portable/GCC/ARM_CM4F/portmacro.h"
 #endif
 #endif
+#endif
 
 #if (__CORTEX_M == 7U)
 /* MPU not supported */