diff --git a/src/unix/dl_macosx.cpp b/src/unix/dl_macosx.cpp
index 60510e7344..b2384b8459 100644
--- a/src/unix/dl_macosx.cpp
+++ b/src/unix/dl_macosx.cpp
@@ -29,7 +29,9 @@ int dlclose(void *handle) /* stub only */
     return 0;
 }
 
-#import <mach-o/dyld.h>
+extern "C" {
+  #import <mach-o/dyld.h>
+};
 
 enum dyldErrorSource
 {