1 files changed, 3 insertions, 0 deletions
diff --git a/src/tools/execution-results.h b/src/tools/execution-results.h
index b8823c3f0..ea822d547 100644
--- a/src/tools/execution-results.h
+++ b/src/tools/execution-results.h
@@ -128,6 +128,9 @@ public:
         } catch (const WasmException& e) {
           return {Literal(int32_t(1))};
         }
+      } else if (import->base == "sleep") {
+        // Do not actually sleep, just return the id.
+        return {arguments[1]};
       } else {
         WASM_UNREACHABLE("unknown fuzzer import");
       }