diff --git a/Formula/tesseract.rb b/Formula/tesseract.rb
index 82faea8050..1570c7f099 100644
--- a/Formula/tesseract.rb
+++ b/Formula/tesseract.rb
@@ -65,6 +65,12 @@ class Tesseract < Formula
   end
 
   def install
+    if build.with? "training-tools"
+      icu4c = Formula["icu4c"]
+      ENV.append "CFLAGS", "-I#{icu4c.opt_include}"
+      ENV.append "LDFLAGS", "-L#{icu4c.opt_lib}"
+    end
+
     # explicitly state leptonica header location, as the makefile defaults to /usr/local/include,
     # which doesn't work for non-default homebrew location
     ENV["LIBLEPT_HEADERSDIR"] = HOMEBREW_PREFIX/"include"