diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index 0bb3fd53e853..f9430886f7c7 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -116,7 +116,7 @@ in rec {
 
       vms = map (m: m.config.system.build.vm) (lib.attrValues nodes);
 
-      ocrProg = tesseract_4.override { enableLanguages = [ "eng" ]; };
+      ocrProg = tesseract4.override { enableLanguages = [ "eng" ]; };
 
       imagemagick_tiff = imagemagick_light.override { inherit libtiff; };
 
diff --git a/pkgs/applications/graphics/tesseract/default.nix b/pkgs/applications/graphics/tesseract/default.nix
index 969402bf7c59..1b6a5556c78c 100644
--- a/pkgs/applications/graphics/tesseract/default.nix
+++ b/pkgs/applications/graphics/tesseract/default.nix
@@ -11,7 +11,7 @@ in
     languages = languages.v3;
   };
 
-  tesseract_4 = lowPrio (callPackage ./wrapper.nix {
+  tesseract4 = lowPrio (callPackage ./wrapper.nix {
     tesseractBase = base4;
     languages = languages.v4;
   });
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 8d29370c8763..2c66878ba812 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -303,6 +303,7 @@ mapAliases ({
   terraform-provider-ibm = terraform-providers.ibm; # added 2018-09-28
   terraform-provider-libvirt = terraform-providers.libvirt; # added 2018-09-28
   terraform-provider-nixos = terraform-providers.nixos; # added 2018-09-28
+  tesseract_4 = tesseract4; # added 2018-12-19
   tex-gyre-bonum-math = tex-gyre-math.bonum; # added 2018-04-03
   tex-gyre-pagella-math = tex-gyre-math.pagella; # added 2018-04-03
   tex-gyre-schola-math = tex-gyre-math.schola; # added 2018-04-03
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e1205b36b0a4..c886f62aa189 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19487,7 +19487,7 @@ in
 
   inherit (callPackage ../applications/graphics/tesseract {})
     tesseract
-    tesseract_4;
+    tesseract4;
 
   tetraproc = callPackage ../applications/audio/tetraproc { };