diff --git a/src/csfml_window.nim b/src/csfml_window.nim
index 7508223..b415c3c 100644
--- a/src/csfml_window.nim
+++ b/src/csfml_window.nim
@@ -24,7 +24,7 @@ include private/csfml_common
 import csfml_system
 
 
-when defined(windows) or defined(mac):
+when defined(windows) or defined(macosx):
   type WindowHandle* = pointer
 else:
   type WindowHandle* = culong
diff --git a/src/private/csfml_common.nim b/src/private/csfml_common.nim
index 4667a07..7a855ec 100644
--- a/src/private/csfml_common.nim
+++ b/src/private/csfml_common.nim
@@ -30,7 +30,7 @@ else:
 
 when defined(windows):
   const lib = "csfml-" & module & "-2.dll"
-elif defined(mac):
+elif defined(macosx):
   const lib = "libcsfml-" & module & ".dylib"
 else:
   const lib = "libcsfml-" & module & ".so"