diff --git a/classlib/src/main/java/org/teavm/classlib/java/lang/TMath.java b/classlib/src/main/java/org/teavm/classlib/java/lang/TMath.java
index 13512312f..2d298daa9 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/lang/TMath.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/lang/TMath.java
@@ -219,7 +219,7 @@ public final class TMath extends TObject {
     }
 
     public static double hypot(double x, double y) {
-        return x * x + y * y;
+        return sqrt(x * x + y * y);
     }
 
     public static double expm1(double x) {