diff --git a/core/trino-main/src/main/java/io/trino/operator/scalar/MathFunctions.java b/core/trino-main/src/main/java/io/trino/operator/scalar/MathFunctions.java
index 5df1d49ae2ec..c5009f121f4a 100644
--- a/core/trino-main/src/main/java/io/trino/operator/scalar/MathFunctions.java
+++ b/core/trino-main/src/main/java/io/trino/operator/scalar/MathFunctions.java
@@ -1176,6 +1176,15 @@ public static boolean isNaN(@SqlType(StandardTypes.DOUBLE) double num)
         return Double.isNaN(num);
     }
 
+    @Description("Test if value is not-a-number")
+    @ScalarFunction("is_nan")
+    @SqlType(StandardTypes.BOOLEAN)
+    public static boolean isNaNReal(@SqlType(StandardTypes.REAL) long value)
+    {
+        float floatValue = intBitsToFloat(toIntExact(value));
+        return Float.isNaN(floatValue);
+    }
+
     @Description("Test if value is finite")
     @ScalarFunction
     @SqlType(StandardTypes.BOOLEAN)
diff --git a/core/trino-main/src/test/java/io/trino/operator/scalar/TestMathFunctions.java b/core/trino-main/src/test/java/io/trino/operator/scalar/TestMathFunctions.java
index 1dd8d5316fec..4df7da04557f 100644
--- a/core/trino-main/src/test/java/io/trino/operator/scalar/TestMathFunctions.java
+++ b/core/trino-main/src/test/java/io/trino/operator/scalar/TestMathFunctions.java
@@ -616,6 +616,7 @@ public void testIsNaN()
         assertFunction("is_nan(0.0E0 / 1.0E0)", BOOLEAN, false);
         assertFunction("is_nan(infinity() / infinity())", BOOLEAN, true);
         assertFunction("is_nan(nan())", BOOLEAN, true);
+        assertFunction("is_nan(REAL 'NaN')", BOOLEAN, true);
         assertFunction("is_nan(REAL '0.0' / REAL '0.0')", BOOLEAN, true);
         assertFunction("is_nan(REAL '0.0' / 1.0E0)", BOOLEAN, false);
         assertFunction("is_nan(infinity() / infinity())", BOOLEAN, true);