diff --git a/shared/static/scripts/sx-browser.js b/shared/static/scripts/sx-browser.js
index 40d3993..f4ce87a 100644
--- a/shared/static/scripts/sx-browser.js
+++ b/shared/static/scripts/sx-browser.js
@@ -506,11 +506,23 @@
     return local;
   }
   function evalCond(clauses, env) {
-    for (var i = 0; i < clauses.length; i += 2) {
-      var test = clauses[i];
-      if (isSym(test) && test.name === ":else") return clauses[i + 1];
-      if (isKw(test) && test.name === "else") return clauses[i + 1];
-      if (isSxTruthy(trampoline(evalExpr(test, env)))) return clauses[i + 1];
+    // Detect scheme-style ((test body) ...) vs clojure-style (test body test body ...)
+    var scheme = clauses.length > 0 && Array.isArray(clauses[0]) && clauses[0].length === 2;
+    if (scheme) {
+      for (var i = 0; i < clauses.length; i++) {
+        var clause = clauses[i];
+        var test = clause[0], body = clause[1];
+        if (isSym(test) && (test.name === "else" || test.name === ":else")) return body;
+        if (isKw(test) && test.name === "else") return body;
+        if (isSxTruthy(trampoline(evalExpr(test, env)))) return body;
+      }
+    } else {
+      for (var i = 0; i < clauses.length; i += 2) {
+        var test = clauses[i];
+        if (isSym(test) && test.name === ":else") return clauses[i + 1];
+        if (isKw(test) && test.name === "else") return clauses[i + 1];
+        if (isSxTruthy(trampoline(evalExpr(test, env)))) return clauses[i + 1];
+      }
     }
     return null;
   }
diff --git a/shared/sx/ref/bootstrap_js.py b/shared/sx/ref/bootstrap_js.py
index c9fec06..2667497 100644
--- a/shared/sx/ref/bootstrap_js.py
+++ b/shared/sx/ref/bootstrap_js.py
@@ -1836,11 +1836,23 @@ PLATFORM_JS_POST = '''
     return local;
   }
   function evalCond(clauses, env) {
-    for (var i = 0; i < clauses.length; i += 2) {
-      var test = clauses[i];
-      if (isSym(test) && test.name === ":else") return clauses[i + 1];
-      if (isKw(test) && test.name === "else") return clauses[i + 1];
-      if (isSxTruthy(trampoline(evalExpr(test, env)))) return clauses[i + 1];
+    // Detect scheme-style ((test body) ...) vs clojure-style (test body test body ...)
+    var scheme = clauses.length > 0 && Array.isArray(clauses[0]) && clauses[0].length === 2;
+    if (scheme) {
+      for (var i = 0; i < clauses.length; i++) {
+        var clause = clauses[i];
+        var test = clause[0], body = clause[1];
+        if (isSym(test) && (test.name === "else" || test.name === ":else")) return body;
+        if (isKw(test) && test.name === "else") return body;
+        if (isSxTruthy(trampoline(evalExpr(test, env)))) return body;
+      }
+    } else {
+      for (var i = 0; i < clauses.length; i += 2) {
+        var test = clauses[i];
+        if (isSym(test) && test.name === ":else") return clauses[i + 1];
+        if (isKw(test) && test.name === "else") return clauses[i + 1];
+        if (isSxTruthy(trampoline(evalExpr(test, env)))) return clauses[i + 1];
+      }
     }
     return null;
   }