diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1025,7 +1025,9 @@
                         if ((flags & SCRIPT_ENABLE_SCHNORR_MULTISIG) &&
                             stacktop(-idxDummy).size() != 0) {
                             // SCHNORR MULTISIG
-                            static_assert(MAX_PUBKEYS_PER_MULTISIG < 32);
+                            static_assert(MAX_PUBKEYS_PER_MULTISIG < 32,
+                                          "Schnorr multisig does support up to "
+                                          "31 pubkeys.");
                             uint32_t checkBits = 0;
 
                             // Dummy element is to be interpreted as a bitfield