diff --git a/cmake/java.cmake b/cmake/java.cmake
index c7327aeb5e..0dbb9aebdb 100644
--- a/cmake/java.cmake
+++ b/cmake/java.cmake
@@ -281,6 +281,10 @@ add_custom_command(
     $<TARGET_FILE:jni${JAVA_ARTIFACT}>
     $<$<NOT:$<PLATFORM_ID:Windows>>:$<TARGET_SONAME_FILE:${PROJECT_NAME}>>
     ${JAVA_RESSOURCES_PATH}/${JAVA_NATIVE_PROJECT}/
+  COMMAND ${CMAKE_COMMAND} -E
+    $<IF:$<BOOL:${BUILD_ZLIB}>,copy,true>
+    $<TARGET_SONAME_FILE:ZLIB::ZLIB>
+    ${JAVA_RESSOURCES_PATH}/${JAVA_NATIVE_PROJECT}/
   COMMAND ${CMAKE_COMMAND} -E
     $<IF:$<BOOL:${BUILD_absl}>,copy,true>
     $<TARGET_SONAME_FILE:absl::base>
diff --git a/cmake/python.cmake b/cmake/python.cmake
index 3687e3be4d..239f7256a2 100644
--- a/cmake/python.cmake
+++ b/cmake/python.cmake
@@ -435,9 +435,12 @@ add_custom_command(
   COMMAND ${CMAKE_COMMAND} -E remove -f ortools_timestamp
   COMMAND ${CMAKE_COMMAND} -E make_directory ${PYTHON_PROJECT}/.libs
   # Don't need to copy static lib on Windows.
+  COMMAND ${CMAKE_COMMAND} -E
+    $<IF:$<BOOL:${BUILD_ZLIB}>,copy,true>
+    $<TARGET_SONAME_FILE:ZLIB::ZLIB>
+    ${PYTHON_PROJECT}/.libs
   COMMAND ${CMAKE_COMMAND} -E
     $<IF:$<BOOL:${BUILD_absl}>,copy,true>
-    # ortools direct deps
     $<TARGET_SONAME_FILE:absl::base>
     $<TARGET_SONAME_FILE:absl::bad_any_cast_impl>
     $<TARGET_SONAME_FILE:absl::bad_optional_access>
diff --git a/ortools/dotnet/Google.OrTools.runtime.csproj.in b/ortools/dotnet/Google.OrTools.runtime.csproj.in
index 057dedb2c9..97451092d4 100644
--- a/ortools/dotnet/Google.OrTools.runtime.csproj.in
+++ b/ortools/dotnet/Google.OrTools.runtime.csproj.in
@@ -27,6 +27,7 @@
     <Content Include="
       $<TARGET_FILE:google-ortools-native>
       $<$<STREQUAL:$<TARGET_PROPERTY:@PROJECT_NAME@,TYPE>,SHARED_LIBRARY>:;$<TARGET_SONAME_FILE:@PROJECT_NAME@>>
+      $<$<BOOL:${BUILD_ZLIB}>:;$<TARGET_SONAME_FILE:ZLIB::ZLIB>>
       $<$<BOOL:${BUILD_absl}>:;$<TARGET_SONAME_FILE:absl::base>>
       $<$<BOOL:${BUILD_absl}>:;$<TARGET_SONAME_FILE:absl::bad_any_cast_impl>>
       $<$<BOOL:${BUILD_absl}>:;$<TARGET_SONAME_FILE:absl::bad_optional_access>>