diff --git a/libimaginteraction/Cargo.toml b/libimaginteraction/Cargo.toml
index 7d84f134..d55bf872 100644
--- a/libimaginteraction/Cargo.toml
+++ b/libimaginteraction/Cargo.toml
@@ -13,6 +13,9 @@ documentation = "https://matthiasbeyer.github.io/imag/imag_documentation/index.h
 repository    = "https://github.com/matthiasbeyer/imag"
 homepage      = "http://imag-pim.org"
 
+[profile.dev]
+codegen-units = 2
+
 [dependencies]
 ansi_term = "0.7.2"
 clap = "2.*"