diff --git a/scss/_card.scss b/scss/_card.scss
index 01a5733d6a..23a5e07c72 100644
--- a/scss/_card.scss
+++ b/scss/_card.scss
@@ -13,7 +13,9 @@
 }
 
 .card-block {
-  @include clearfix;
+  @if (not $enable-flex) {
+    @include clearfix;
+  }
   padding: $card-spacer-x;
 }
 
@@ -68,7 +70,9 @@
 //
 
 .card-header {
-  @include clearfix;
+  @if (not $enable-flex) {
+    @include clearfix;
+  }
   padding: $card-spacer-y $card-spacer-x;
   margin-bottom: 0; // Removes the default margin-bottom of <hN>
   background-color: $card-cap-bg;
@@ -80,7 +84,9 @@
 }
 
 .card-footer {
-  @include clearfix;
+  @if (not $enable-flex) {
+    @include clearfix;
+  }
   padding: $card-spacer-y $card-spacer-x;
   background-color: $card-cap-bg;
   border-top: $card-border-width solid $card-border-color;