diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -42,7 +42,7 @@
 
     # generate the index file
     add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/index.katesyntax"
-    COMMAND katehighlightingindexer "${CMAKE_CURRENT_BINARY_DIR}/index.katesyntax" "${CMAKE_CURRENT_SOURCE_DIR}/schema/language.xsd" "${CMAKE_CURRENT_BINARY_DIR}/syntax-data.qrc"
+    COMMAND $<TARGET_FILE:katehighlightingindexer> "${CMAKE_CURRENT_BINARY_DIR}/index.katesyntax" "${CMAKE_CURRENT_SOURCE_DIR}/schema/language.xsd" "${CMAKE_CURRENT_BINARY_DIR}/syntax-data.qrc"
     DEPENDS ${defs} ${CMAKE_CURRENT_SOURCE_DIR}/schema/language.xsd ${CMAKE_CURRENT_BINARY_DIR}/syntax-data.qrc
     )