diff --git a/src/elements/input.less b/src/elements/input.less
index 5ad01aaf0..de086a9f2 100755
--- a/src/elements/input.less
+++ b/src/elements/input.less
@@ -317,23 +317,23 @@
 ---------------------*/
 
 .ui.mini.input {
-  font-size: 0.8125rem;
+  font-size: 0.8125em;
 }
 .ui.small.input {
-  font-size: 0.875rem;
+  font-size: 0.875em;
 }
 .ui.input {
-  font-size: 1rem;
+  font-size: 1em;
 }
 .ui.large.input {
-  font-size: 1.125rem;
+  font-size: 1.125em;
 }
 .ui.big.input {
-  font-size: 1.25rem;
+  font-size: 1.25em;
 }
 .ui.huge.input {
-  font-size: 1.375rem;
+  font-size: 1.375em;
 }
 .ui.massive.input {
-  font-size: 1.5rem;
+  font-size: 1.5em;
 }
\ No newline at end of file