diff --git a/libphobos/src/std/math/hardware.d b/libphobos/src/std/math/hardware.d
index 90bc96df148..b768969d4cf 100644
--- a/libphobos/src/std/math/hardware.d
+++ b/libphobos/src/std/math/hardware.d
@@ -912,6 +912,7 @@ private:
             }
             else version (AArch64)
             {
+                ControlState cont;
                 asm pure nothrow @nogc
                 {
                     "mrs %0, FPCR;" : "=r" (cont);