diff --git a/emtests/printf.c b/emtests/printf.c
index 55abc0ad5..603ad5feb 100644
--- a/emtests/printf.c
+++ b/emtests/printf.c
@@ -27,19 +27,19 @@ int main() {
   printf("Width trick: %*d\n", 5, 10);
   printf("%s %%\n", "A string");
   printf("Null string: %7s\n", NULL);
-//   printf("Null pointer: %p\n", NULL);
-//   printf("%lf\n", INFINITY);
-//   printf("%lF\n", INFINITY);
-//   printf("%lf\n", -INFINITY);
-//   printf("%lF\n", -INFINITY);
-//   printf("%lf\n", NAN);
-//   printf("%lF\n", NAN);
-//   printf("%10f\n", NAN);
-//   printf("%-10f\n", NAN);
-//   printf("%010.2f\n", NAN);
-//   printf("%-010.2f\n", NAN);
-//   printf("%10.f\n", INFINITY);
-//   printf("%-10.f\n", -INFINITY);
+//  printf("Null pointer: %p\n", NULL);
+  printf("%lf\n", INFINITY);
+  printf("%lF\n", INFINITY);
+  printf("%lf\n", -INFINITY);
+  printf("%lF\n", -INFINITY);
+  printf("%lf\n", NAN);
+  printf("%lF\n", NAN);
+  printf("%10f\n", NAN);
+  printf("%-10f\n", NAN);
+  printf("%010.2f\n", NAN);
+  printf("%-010.2f\n", NAN);
+  printf("%10.f\n", INFINITY);
+  printf("%-10.f\n", -INFINITY);
 //   printf("--rest--\n");
 //   printf("in%%3.5valid\n", 0);
 //   printf("%.f\n", 0.0f);
diff --git a/emtests/printf.output b/emtests/printf.output
index 5136a9d2b..ac02f590a 100644
--- a/emtests/printf.output
+++ b/emtests/printf.output
@@ -15,3 +15,15 @@ Force sign or space:  3.14 -3.14   3.14  -3.14
 Width trick:    10
 A string %
 Null string:  (null)
+inf
+INF
+-inf
+-INF
+nan
+NAN
+       nan
+nan       
+       nan
+nan       
+       inf
+-inf      
diff --git a/emtests/printf.wasm b/emtests/printf.wasm
index bd5c1ebf4..69cc16f2b 100644
Binary files a/emtests/printf.wasm and b/emtests/printf.wasm differ
diff --git a/src/apis/emscripten/mod.rs b/src/apis/emscripten/mod.rs
index 601a631ae..f1520c9d9 100644
--- a/src/apis/emscripten/mod.rs
+++ b/src/apis/emscripten/mod.rs
@@ -91,6 +91,16 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "DYNAMICTOP_PTR",
         ImportValue::Global(dynamictop_ptr(STATIC_BUMP) as _),
     );
+    import_object.set(
+        "global",
+        "Infinity",
+        ImportValue::Global(std::f64::INFINITY.to_bits() as _),
+    );
+    import_object.set(
+        "global",
+        "NaN",
+        ImportValue::Global(std::f64::NAN.to_bits() as _),
+    );
     import_object.set("env", "tableBase", ImportValue::Global(0));
     // Print functions
     import_object.set("env", "printf", ImportValue::Func(io::printf as _));