diff --git a/mkspecs/features/wasm/wasm.prf b/mkspecs/features/wasm/wasm.prf
index c1a1a3a73e7..c1089e430e0 100644
--- a/mkspecs/features/wasm/wasm.prf
+++ b/mkspecs/features/wasm/wasm.prf
@@ -49,7 +49,11 @@ exists($$QMAKE_QT_CONFIG) {
     }
     EMCC_LFLAGS += -s INITIAL_MEMORY=$$INITIAL_MEMORY
     isEmpty(QT_WASM_MAXIMUM_MEMORY) {
-        MAXIMUM_MEMORY = 4GB # 32-bit max
+        qtConfig(wasm-jspi) {
+            MAXIMUM_MEMORY = 2GB # Avoid triggering Emscripten bug #23834
+        } else {
+            MAXIMUM_MEMORY = 4GB # 32-bit max
+        }
     } else {
         MAXIMUM_MEMORY = $$QT_WASM_MAXIMUM_MEMORY
     }