diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 77453c4e533..a983db5245e 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -367,7 +367,7 @@ let
     xml2 = [ pkgs.libxml2.dev ];
     XML = [ pkgs.libtool pkgs.libxml2.dev pkgs.xmlsec pkgs.libxslt ];
     affyPLM = [ pkgs.zlib.dev ];
-    bamsignals = [ pkgs.zlib ];
+    bamsignals = [ pkgs.zlib.dev ];
     BitSeq = [ pkgs.zlib ];
     DiffBind = [ pkgs.zlib ];
     ShortRead = [ pkgs.zlib.dev ];