diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index bd819d365ae..83a561a7e78 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1843,20 +1843,20 @@ std::vector<std::unique_ptr<PubkeyProvider>> ParsePubkey(uint32_t& key_exp_index
         bool any_ranged = false;
         bool all_bip32 = true;
         std::vector<std::vector<std::unique_ptr<PubkeyProvider>>> providers;
-        bool any_key_parsed = true;
+        bool any_key_parsed = false;
         size_t max_multipath_len = 0;
         while (expr.size()) {
-            if (!any_key_parsed && !Const(",", expr)) {
+            if (any_key_parsed && !Const(",", expr)) {
                 error = strprintf("musig(): expected ',', got '%c'", expr[0]);
                 return {};
             }
-            any_key_parsed = false;
             auto arg = Expr(expr);
             auto pk = ParsePubkey(key_exp_index, arg, ParseScriptContext::MUSIG, out, error);
             if (pk.empty()) {
                 error = strprintf("musig(): %s", error);
                 return {};
             }
+            any_key_parsed = true;
 
             any_ranged = any_ranged || pk.at(0)->IsRange();
             all_bip32 = all_bip32 &&  pk.at(0)->IsBIP32();
@@ -1866,7 +1866,7 @@ std::vector<std::unique_ptr<PubkeyProvider>> ParsePubkey(uint32_t& key_exp_index
             providers.emplace_back(std::move(pk));
             key_exp_index++;
         }
-        if (any_key_parsed) {
+        if (!any_key_parsed) {
             error = "musig(): Must contain key expressions";
             return {};
         }