diff --git a/lib/js/src/style.js b/lib/js/src/style.js
index 4d795ce9e..1d615d5c6 100644
--- a/lib/js/src/style.js
+++ b/lib/js/src/style.js
@@ -752,10 +752,10 @@ function fontFamily(param) {
         ];
 }
 
-function fontSize(param) {
+function fontSize(value) {
   return /* tuple */[
           "fontSize",
-          param
+          value[0]
         ];
 }
 
diff --git a/src/style.re b/src/style.re
index b5fab6ec9..535301d73 100644
--- a/src/style.re
+++ b/src/style.re
@@ -532,7 +532,7 @@ let color = stringStyle("color");
 
 let fontFamily = stringStyle("fontFamily");
 
-let fontSize = floatStyle("fontSize");
+let fontSize = (value) => ("fontSize", encode_float_interpolated_animated(value));
 
 type fontStyle =
   | Normal
diff --git a/src/style.rei b/src/style.rei
index b73bb8a18..5490057fa 100644
--- a/src/style.rei
+++ b/src/style.rei
@@ -304,7 +304,7 @@ let color: string => styleElement;
 
 let fontFamily: string => styleElement;
 
-let fontSize: float => styleElement;
+let fontSize: float_interpolated_animated => styleElement;
 
 type fontStyle =
   | Normal