diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index aa2b658b54..1458826e39 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -35,6 +35,7 @@ if(ENABLE_CURL_MANUAL AND HAVE_MANUAL_TOOLS)
     COMMAND "${PERL_EXECUTABLE}" "${CMAKE_CURRENT_SOURCE_DIR}/mkhelp.pl" -c < "${CURL_ASCIIPAGE}" >> "tool_hugehelp.c"
     COMMAND ${CMAKE_COMMAND} -E echo "#endif /* HAVE_LIBZ */" >> "tool_hugehelp.c"
     DEPENDS
+      generate-curl.1
       "${CMAKE_CURRENT_SOURCE_DIR}/mkhelp.pl"
       "${CMAKE_CURRENT_SOURCE_DIR}/tool_hugehelp.h"
       "${CURL_ASCIIPAGE}"