diff --git a/Formula/netcdf.rb b/Formula/netcdf.rb
index 8c80ee30438..64965269837 100644
--- a/Formula/netcdf.rb
+++ b/Formula/netcdf.rb
@@ -52,7 +52,7 @@ class Netcdf < Formula
 
     # Add newly created installation to paths so that binding libraries can
     # find the core libs.
-    ENV.prepend 'PATH', bin
+    ENV.prepend 'PATH', bin, ':'
     ENV.prepend 'CPPFLAGS', "-I#{include}"
     ENV.prepend 'LDFLAGS', "-L#{lib}"