diff --git a/CMakeLists.txt b/CMakeLists.txt
index cce875a..0b04be7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -530,8 +530,8 @@ endif()
 if (GPERF AND RUN_GPERF_IF_PRESENT)
     macro(ADD_GPERF_FILE input)
         add_custom_command(OUTPUT poppler/${input}.c
-                       COMMAND gperf poppler/${input}.gperf > ${CMAKE_CURRENT_BINARY_DIR}/poppler/${input}.c
-                       COMMAND gperf poppler/${input}.gperf > ${CMAKE_CURRENT_SOURCE_DIR}/poppler/${input}.pregenerated.c
+                       COMMAND ${GPERF} poppler/${input}.gperf > ${CMAKE_CURRENT_BINARY_DIR}/poppler/${input}.c
+                       COMMAND ${GPERF} poppler/${input}.gperf > ${CMAKE_CURRENT_SOURCE_DIR}/poppler/${input}.pregenerated.c
                        COMMAND clang-format -i ${CMAKE_CURRENT_SOURCE_DIR}/poppler/${input}.pregenerated.c || true
                        DEPENDS poppler/${input}.gperf
                        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})