diff --git a/src/core/address_space.cpp b/src/core/address_space.cpp
index eae3b146b..2d44e62df 100644
--- a/src/core/address_space.cpp
+++ b/src/core/address_space.cpp
@@ -717,7 +717,7 @@ struct AddressSpace::Impl {
               int fd = -1) {
         m_free_regions.subtract({virtual_addr, virtual_addr + size});
 #ifdef __APPLE__
-        if (prot & PROT_EXEC != 0) {
+        if ((prot & PROT_EXEC) != 0) {
             ASSERT_MSG(fd == -1, "Requested execute permissions for file mapping");
             phys_addr = -1;
         }