diff --git a/packages.txt b/packages.txt
index 4ba4978..0017ca0 100644
--- a/packages.txt
+++ b/packages.txt
@@ -247,6 +247,7 @@ compat-sap-c++-10
 compat-sap-c++-11
 compat-sap-c++-12
 compat-sap-c++-13
+compat-sap-c++-15
 compat-sap-c++-9
 compiler-rt
 composefs