diff --git a/src/internal/task/task_stack_cortexm.S b/src/internal/task/task_stack_cortexm.S
index afb23eb2..fe1f44e0 100644
--- a/src/internal/task/task_stack_cortexm.S
+++ b/src/internal/task/task_stack_cortexm.S
@@ -114,9 +114,9 @@ tinygo_swapTask:
     pop {r4-r11, pc}
     #else
     pop {r4-r7}
-    .cfi_def_cfa_offset 5*9
+    .cfi_def_cfa_offset 5*4
     pop {r0-r3}
-    .cfi_def_cfa_offset 1*9
+    .cfi_def_cfa_offset 1*4
     mov r8, r0
     mov r9, r1
     mov r10, r2