diff --git a/src/postamble.js b/src/postamble.js
index 39cb9b4c8452e..4260563310685 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -10,10 +10,6 @@
 #include "source_map_support.js"
 #endif
 
-#if ASSERTIONS
-var calledRun;
-#endif
-
 #if STANDALONE_WASM && MAIN_READS_PARAMS
 var mainArgs = undefined;
 #endif
@@ -115,11 +111,6 @@ function stackCheckInit() {
 #endif
 
 {{{ asyncIf(MODULARIZE || ASYNCIFY == 2 || expectToReceiveOnModule('setStatus') || '$runDependencies' in addedLibraryItems) }}}function run({{{ MAIN_READS_PARAMS ? 'args = programArgs' : '' }}}) {
-#if ASSERTIONS
-  assert(!calledRun);
-  calledRun = true;
-#endif
-
 #if PTHREADS || WASM_WORKERS
   if ({{{ ENVIRONMENT_IS_WORKER_THREAD() }}}) {
     initRuntime();
diff --git a/test/codesize/test_codesize_hello_O0.json b/test/codesize/test_codesize_hello_O0.json
index 7801c7b9f8b8f..f6f830508e7bd 100644
--- a/test/codesize/test_codesize_hello_O0.json
+++ b/test/codesize/test_codesize_hello_O0.json
@@ -1,10 +1,10 @@
 {
-  "a.out.js": 23425,
-  "a.out.js.gz": 8505,
+  "a.out.js": 23400,
+  "a.out.js.gz": 8495,
   "a.out.nodebug.wasm": 15115,
   "a.out.nodebug.wasm.gz": 7464,
-  "total": 38540,
-  "total_gz": 15969,
+  "total": 38515,
+  "total_gz": 15959,
   "sent": [
     "fd_write"
   ],
diff --git a/test/codesize/test_codesize_minimal_O0.expected.js b/test/codesize/test_codesize_minimal_O0.expected.js
index 8a27acdfbeecc..a940ef35cf597 100644
--- a/test/codesize/test_codesize_minimal_O0.expected.js
+++ b/test/codesize/test_codesize_minimal_O0.expected.js
@@ -1323,8 +1323,6 @@ var wasmImports = {
 // include: postamble.js
 // === Auto-generated postamble setup entry stuff ===
 
-var calledRun;
-
 function stackCheckInit() {
   // This is normally called automatically during __wasm_call_ctors but need to
   // get these values before even running any of the ctors so we call it redundantly
@@ -1335,8 +1333,6 @@ function stackCheckInit() {
 }
 
 function run() {
-  assert(!calledRun);
-  calledRun = true;
 
   stackCheckInit();
 
diff --git a/test/codesize/test_codesize_minimal_O0.json b/test/codesize/test_codesize_minimal_O0.json
index 3228e0b26d512..24e52387c7357 100644
--- a/test/codesize/test_codesize_minimal_O0.json
+++ b/test/codesize/test_codesize_minimal_O0.json
@@ -1,10 +1,10 @@
 {
-  "a.out.js": 18665,
-  "a.out.js.gz": 6759,
+  "a.out.js": 18643,
+  "a.out.js.gz": 6747,
   "a.out.nodebug.wasm": 1015,
   "a.out.nodebug.wasm.gz": 602,
-  "total": 19680,
-  "total_gz": 7361,
+  "total": 19658,
+  "total_gz": 7349,
   "sent": [],
   "imports": [],
   "exports": [
diff --git a/test/codesize/test_unoptimized_code_size.json b/test/codesize/test_unoptimized_code_size.json
index 094dd70c77809..c33621e48e02a 100644
--- a/test/codesize/test_unoptimized_code_size.json
+++ b/test/codesize/test_unoptimized_code_size.json
@@ -1,16 +1,16 @@
 {
-  "hello_world.js": 55193,
-  "hello_world.js.gz": 17384,
+  "hello_world.js": 55135,
+  "hello_world.js.gz": 17370,
   "hello_world.wasm": 15115,
   "hello_world.wasm.gz": 7464,
   "no_asserts.js": 25683,
   "no_asserts.js.gz": 8690,
   "no_asserts.wasm": 12229,
   "no_asserts.wasm.gz": 6004,
-  "strict.js": 52921,
-  "strict.js.gz": 16589,
+  "strict.js": 52863,
+  "strict.js.gz": 16574,
   "strict.wasm": 15115,
   "strict.wasm.gz": 7461,
-  "total": 176256,
-  "total_gz": 63592
+  "total": 176140,
+  "total_gz": 63563
 }