diff --git a/packages/preset-mini/src/_rules/typography.ts b/packages/preset-mini/src/_rules/typography.ts
index 6995e6eb4d..cc5de54085 100644
--- a/packages/preset-mini/src/_rules/typography.ts
+++ b/packages/preset-mini/src/_rules/typography.ts
@@ -44,9 +44,10 @@ export const fonts: Rule<Theme>[] = [
         }
       }
 
-      if (lineHeight) {
+      const fontSize = h.bracketOfLength.rem(size)
+      if (lineHeight && fontSize) {
         return {
-          'font-size': h.bracketOfLength.rem(size),
+          'font-size': fontSize,
           'line-height': lineHeight,
         }
       }
diff --git a/test/assets/preset-mini-targets.ts b/test/assets/preset-mini-targets.ts
index df815bfa91..3c2c134316 100644
--- a/test/assets/preset-mini-targets.ts
+++ b/test/assets/preset-mini-targets.ts
@@ -1092,4 +1092,7 @@ export const presetMiniNonTargets = [
   '[Baz::class]',
   // escaped arbitrary css properties only allowed in css variables
   '[cant\~escape:me]',
+
+  // not exists
+  'text-main/50',
 ]