diff --git a/include/rapidjson/document.h b/include/rapidjson/document.h
index d1f1b6f..855543e 100644
--- a/include/rapidjson/document.h
+++ b/include/rapidjson/document.h
@@ -1649,7 +1649,6 @@ public:
     /*! \note If the value is 64-bit integer type, it may lose precision. Use \c IsLosslessFloat() to check whether the converison is lossless.
     */
     float GetFloat() const {
-        RAPIDJSON_ASSERT(IsFloat());
         return static_cast<float>(GetDouble());
     }
 
diff --git a/test/unittest/valuetest.cpp b/test/unittest/valuetest.cpp
index 9d3609d..d6c7492 100644
--- a/test/unittest/valuetest.cpp
+++ b/test/unittest/valuetest.cpp
@@ -652,6 +652,10 @@ TEST(Value, Float) {
     z.SetFloat(12.34f);
     EXPECT_NEAR(12.34f, z.GetFloat(), 0.0f);
 
+    // Issue 573
+    z.SetInt(0);
+    EXPECT_EQ(0.0f, z.GetFloat());
+
     z = 56.78f;
     EXPECT_NEAR(56.78f, z.GetFloat(), 0.0f);