diff --git a/interpreters/toywasm/regen.sh b/interpreters/toywasm/regen.sh
index 76800602b..091484cd0 100755
--- a/interpreters/toywasm/regen.sh
+++ b/interpreters/toywasm/regen.sh
@@ -24,6 +24,7 @@ cmake -B ${BUILDDIR} \
 -DTOYWASM_ENABLE_WASM_EXTENDED_CONST=ON \
 -DTOYWASM_ENABLE_WASM_MULTI_MEMORY=ON \
 -DTOYWASM_ENABLE_WASM_TAILCALL=ON \
+-DTOYWASM_ENABLE_WASM_CUSTOM_PAGE_SIZES=ON \
 -DTOYWASM_ENABLE_WASM_THREADS=ON \
 -DTOYWASM_ENABLE_WASI_THREADS=ON \
 -DTOYWASM_ENABLE_DYLD=ON \