diff --git a/cmake/build_helpers.cmake b/cmake/build_helpers.cmake
index ad2f3b688..213d9fef8 100644
--- a/cmake/build_helpers.cmake
+++ b/cmake/build_helpers.cmake
@@ -678,9 +678,12 @@ function(generatePDBs)
         add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.pdb
                 WORKING_DIRECTORY ${cv2pdb_SOURCE_DIR}
                 COMMAND
-        (${CMAKE_COMMAND} -E remove -f ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.pdb &&
-                ${cv2pdb_SOURCE_DIR}/cv2pdb64.exe
-                $<TARGET_FILE:${PDB}>) || (exit 0)
+                (
+                    ${CMAKE_COMMAND} -E copy_if_different $<TARGET_FILE:${PDB}> ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.bak &&
+                    ${CMAKE_COMMAND} -E remove -f ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.pdb &&
+                    ${cv2pdb_SOURCE_DIR}/cv2pdb64.exe ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.bak &&
+                    ${CMAKE_COMMAND} -E remove -f ${CMAKE_BINARY_DIR}/${GENERATED_PDB}.bak
+                ) || (exit 0)
                 DEPENDS $<TARGET_FILE:${PDB}>
                 COMMAND_EXPAND_LISTS)