diff --git a/src/common.h b/src/common.h
index bb599e9..da382e3 100644
--- a/src/common.h
+++ b/src/common.h
@@ -27,7 +27,7 @@
 // #define TEST_STACK
 // #define DEBUG_STACK
 // #define DEBUG_STEP
-// #define DEBUG_STRESS_GC
+#define DEBUG_STRESS_GC
 // #define DEBUG_LOG_GC
 // #define DEBUG_GC
 // #define DEBUG_TPMC_MATCH
diff --git a/src/debug.c b/src/debug.c
index 948807b..077ee48 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -496,6 +496,26 @@ void printCexpIf(CexpIf *x) {
     fprintf(stderr, ")");
 }
 
+void printCexpCond(CexpCond *x) {
+    fprintf(stderr, "(cond ");
+    printAexp(x->condition);
+    fprintf(stderr, " ");
+    printCexpCondCases(x->cases);
+    fprintf(stderr, ")");
+}
+
+void printCexpCondCases(CexpCondCases *x) {
+    while (x != NULL) {
+        fprintf(stderr, "(%d ", x->option);
+        printExp(x->body);
+        fprintf(stderr, ")");
+        if (x->next) {
+            fprintf(stderr, " ");
+        }
+        x = x->next;
+    }
+}
+
 void printCexpLetRec(CexpLetRec *x) {
     fprintf(stderr, "(letrec ");
     printLetRecBindings(x->bindings);
@@ -625,6 +645,9 @@ void printCexp(Cexp *x) {
         case CEXP_TYPE_IF:
             printCexpIf(x->val.iff);
             break;
+        case CEXP_TYPE_COND:
+            printCexpCond(x->val.cond);
+            break;
         case CEXP_TYPE_CALLCC:
             fprintf(stderr, "(call/cc ");
             printAexp(x->val.callCC);
diff --git a/src/debug.h b/src/debug.h
index 1708743..4ebaa30 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -41,6 +41,8 @@ void printCexp(Cexp *x);
 void printCexpMatch(CexpMatch *x);
 void printMatchList(MatchList *x);
 void printCexpIf(CexpIf *x);
+void printCexpCond(CexpCond *x);
+void printCexpCondCases(CexpCondCases *x);
 void printCexpLetRec(CexpLetRec *x);
 void printCTEnv(CTEnv *x);
 void printExp(Exp *x);