diff --git a/src/gos/gos_x_threads_cortexm01.h b/src/gos/gos_x_threads_cortexm01.h
index b646d083..af6363c3 100644
--- a/src/gos/gos_x_threads_cortexm01.h
+++ b/src/gos/gos_x_threads_cortexm01.h
@@ -107,7 +107,7 @@
 		ldr      r1,[r2,#__cpp(offsetof(thread,fn))]
 		blx      r1
 		mov      r4,r0
-		bl       gfxThreadExit
+		bl       __cpp(gfxThreadExit)
 	}
 
 #else
diff --git a/src/gos/gos_x_threads_cortexm347.h b/src/gos/gos_x_threads_cortexm347.h
index 13893d3d..2d7e0584 100644
--- a/src/gos/gos_x_threads_cortexm347.h
+++ b/src/gos/gos_x_threads_cortexm347.h
@@ -78,7 +78,7 @@
 		ldr      r1,[r2,#__cpp(offsetof(thread,fn))]
 		blx      r1
 		mov      r4,r0
-		bl       gfxThreadExit
+		bl       __cpp(gfxThreadExit)
 	}
 
 #else
diff --git a/src/gos/gos_x_threads_cortexm47fp.h b/src/gos/gos_x_threads_cortexm47fp.h
index 2ee98eaf..62812c2e 100644
--- a/src/gos/gos_x_threads_cortexm47fp.h
+++ b/src/gos/gos_x_threads_cortexm47fp.h
@@ -83,7 +83,7 @@
 		ldr      r1,[r2,#__cpp(offsetof(thread,fn))]
 		blx      r1
 		mov      r4,r0
-		bl       gfxThreadExit
+		bl       __cpp(gfxThreadExit)
 	}
 
 #else