diff --git a/nongnu/packages/dotnet.scm b/nongnu/packages/dotnet.scm
index c60f0fc1..8122dee1 100644
--- a/nongnu/packages/dotnet.scm
+++ b/nongnu/packages/dotnet.scm
@@ -177,7 +177,7 @@ various IDEs and plugins.")
               (files '("share/dotnet")))))
       (inputs
        `(("gcc:lib" ,gcc "lib")
-         ("icu4c" ,icu4c)
+         ("icu4c" ,icu4c-71)
          ("lttng-ust" ,lttng-ust)
          ("mit-krb5" ,mit-krb5)
          ("openssl" ,openssl)
@@ -287,7 +287,7 @@ building different types of applications.")
       (inputs
        `(("gcc:lib" ,gcc "lib")
          ("glibc", glibc)
-         ("icu4c" ,icu4c)
+         ("icu4c" ,icu4c-71)
          ("lttng-ust" ,lttng-ust)
          ("mit-krb5" ,mit-krb5)
          ("openssl" ,openssl)