diff --git a/doc/doxygen/src/css/riot.css b/doc/doxygen/src/css/riot.css
index d6aa02d22..0e524ccd5 100644
--- a/doc/doxygen/src/css/riot.css
+++ b/doc/doxygen/src/css/riot.css
@@ -488,6 +488,10 @@ dl.todo > dt {
 }
 .params .paramdir {
   font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
+  padding-right: 0.5em;
+}
+.params .paramname {
+  padding-right: 2em;
 }
 .icon {
   font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
diff --git a/doc/doxygen/src/css/riot.less b/doc/doxygen/src/css/riot.less
index 27e037c59..dab92636e 100644
--- a/doc/doxygen/src/css/riot.less
+++ b/doc/doxygen/src/css/riot.less
@@ -434,6 +434,10 @@ dl.todo > dt {
 }
 .params .paramdir {
   font-family: @font-family-monospace;
+  padding-right: 0.5em;
+}
+.params .paramname {
+  padding-right: 2em;
 }
 .icon {
   font-family: @font-family-base;