diff --git a/.waf-tools/default-compiler-flags.py b/.waf-tools/default-compiler-flags.py
index 3899b06..c946d1f 100644
--- a/.waf-tools/default-compiler-flags.py
+++ b/.waf-tools/default-compiler-flags.py
@@ -188,7 +188,7 @@
                               '-Wno-unused-local-typedef', # Bugs #2657 and #3209
                               ]
         version = tuple(int(i) for i in conf.env['CC_VERSION'])
-        if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (9, 0, 0)):
+        if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (8, 1, 0)):
             flags['CXXFLAGS'] += ['-Wno-unknown-pragmas']
         return flags
 
@@ -200,6 +200,6 @@
                               '-Wno-unused-local-typedef', # Bugs #2657 and #3209
                               ]
         version = tuple(int(i) for i in conf.env['CC_VERSION'])
-        if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (9, 0, 0)):
+        if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (8, 1, 0)):
             flags['CXXFLAGS'] += ['-Wno-unknown-pragmas']
         return flags