diff --git a/py/nlrx64.c b/py/nlrx64.c
index f5d02afbdb..6f006e755e 100644
--- a/py/nlrx64.c
+++ b/py/nlrx64.c
@@ -58,7 +58,7 @@ unsigned int nlr_push(nlr_buf_t *nlr) {
     #else
 
     __asm volatile (
-        #if defined(__APPLE__) || defined(__MACH__)
+        #if defined(__APPLE__) && defined(__MACH__)
         "pop    %rbp                \n" // undo function's prelude
         #endif
         "movq   (%rsp), %rax        \n" // load return %rip
@@ -70,7 +70,7 @@ unsigned int nlr_push(nlr_buf_t *nlr) {
         "movq   %r13, 56(%rdi)      \n" // store %r13 into nlr_buf
         "movq   %r14, 64(%rdi)      \n" // store %r14 into nlr_buf
         "movq   %r15, 72(%rdi)      \n" // store %r15 into nlr_buf
-        #if defined(__APPLE__) || defined(__MACH__)
+        #if defined(__APPLE__) && defined(__MACH__)
         "jmp    _nlr_push_tail      \n" // do the rest in C
         #else
         "jmp    nlr_push_tail       \n" // do the rest in C