diff --git a/src/tools/libjpeg.jam b/src/tools/libjpeg.jam
index 128ab6353..252239197 100644
--- a/src/tools/libjpeg.jam
+++ b/src/tools/libjpeg.jam
@@ -166,7 +166,7 @@ rule init (
     }
     else if $(source-path) && ! $(no-build-from-source)
     {
-        build-name ?= z ;
+        build-name ?= jpeg ;
         library-id = [ CALC $(library-id) + 1 ] ;
         tag = [ MATCH ^@?(.*)$ : $(tag) ] ;
         if $(tag) && ! [ MATCH ^([^%]*)%([^%]+)$ : $(tag) ]
diff --git a/src/tools/libpng.jam b/src/tools/libpng.jam
index 578cfe8fc..999fafcd1 100644
--- a/src/tools/libpng.jam
+++ b/src/tools/libpng.jam
@@ -159,7 +159,7 @@ rule init (
     }
     else if $(source-path) && ! $(no-build-from-source)
     {
-        build-name ?= z ;
+        build-name ?= png ;
         library-id = [ CALC $(library-id) + 1 ] ;
         tag = [ MATCH ^@?(.*)$ : $(tag) ] ;
         if $(tag) && ! [ MATCH ^([^%]*)%([^%]+)$ : $(tag) ]
diff --git a/src/tools/libtiff.jam b/src/tools/libtiff.jam
index 14f235e3f..8285bb7fd 100644
--- a/src/tools/libtiff.jam
+++ b/src/tools/libtiff.jam
@@ -163,7 +163,7 @@ rule init (
     }
     else if $(source-path) && ! $(no-build-from-source)
     {
-        build-name ?= z ;
+        build-name ?= tiff ;
         library-id = [ CALC $(library-id) + 1 ] ;
         tag = [ MATCH ^@?(.*)$ : $(tag) ] ;
         if $(tag) && ! [ MATCH ^([^%]*)%([^%]+)$ : $(tag) ]