diff --git a/SConstruct b/SConstruct
index ce955fc..3ff241a 100644
--- a/SConstruct
+++ b/SConstruct
@@ -325,7 +325,7 @@ def CheckSystemASIOVersion(context):
 #pragma message "Asio version:" XSTR(ASIO_VERSION)
 #if ASIO_VERSION < 101008
 #error Included asio version is too old
-#elif ASIO_VERSION >= 101100
+#elif ASIO_VERSION >= 102600
 #error Included asio version is too new
 #endif
 
@@ -335,7 +335,7 @@ int main()
 }
 
 """
-    context.Message('Checking ASIO version (>= 1.10.8 and < 1.11.0) ... ')
+    context.Message('Checking ASIO version (>= 1.10.8 and < 1.26.0) ... ')
     result = context.TryLink(system_asio_test_source_file, '.cpp')
     context.Result(result)
     return result
