diff --git a/pkgs/development/compilers/chicken/4/setup-hook.sh b/pkgs/development/compilers/chicken/4/setup-hook.sh
index b0d9b53b537..661dc08c090 100644
--- a/pkgs/development/compilers/chicken/4/setup-hook.sh
+++ b/pkgs/development/compilers/chicken/4/setup-hook.sh
@@ -1,7 +1,6 @@
 addChickenRepositoryPath() {
     addToSearchPathWithCustomDelimiter : CHICKEN_REPOSITORY_EXTRA "$1/lib/chicken/8/"
-    # addToSearchPathWithCustomDelimiter \; CHICKEN_INCLUDE_PATH "$1/share/"
-    export CHICKEN_INCLUDE_PATH="$1/share;$CHICKEN_INCLUDE_PATH"
+    export CHICKEN_INCLUDE_PATH="$1/share${CHICKEN_INCLUDE_PATH:+;$CHICKEN_INCLUDE_PATH}"
 }
 
 addEnvHooks "$targetOffset" addChickenRepositoryPath