--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,7 +6,7 @@ IF(NOT HAVE_GETOPT)
 ENDIF(NOT HAVE_GETOPT)
 
 ADD_EXECUTABLE(zipcmp zipcmp.c ${SRC_EXTRA_FILES})
-TARGET_LINK_LIBRARIES(zipcmp zip)
+TARGET_LINK_LIBRARIES(zipcmp zip ${FTS_LIB})
 INSTALL(TARGETS zipcmp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 ADD_EXECUTABLE(zipmerge zipmerge.c ${SRC_EXTRA_FILES})
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ OPTION(BUILD_DOC "Build documentation" O
 
 INCLUDE(CheckFunctionExists)
 INCLUDE(CheckIncludeFiles)
+INCLUDE(CheckLibraryExists)
 INCLUDE(CheckSymbolExists)
 INCLUDE(CheckTypeSize)
 INCLUDE(CheckCSourceRuns)
@@ -158,6 +159,20 @@ CHECK_FUNCTION_EXISTS(strtoll HAVE_STRTO
 CHECK_FUNCTION_EXISTS(strtoull HAVE_STRTOULL)
 
 CHECK_INCLUDE_FILES("sys/types.h;sys/stat.h;fts.h" HAVE_FTS_H)
+# fts functions may be in external library
+IF(HAVE_FTS_H)
+  CHECK_FUNCTION_EXISTS(fts_open HAVE_FTS_OPEN)
+  IF(NOT HAVE_FTS_OPEN)
+    CHECK_LIBRARY_EXISTS(fts fts_open "" HAVE_LIB_FTS)
+  ENDIF(NOT HAVE_FTS_OPEN)
+ENDIF(HAVE_FTS_H)
+
+IF(HAVE_LIB_FTS)
+  SET(FTS_LIB fts)
+ELSE()
+  SET(FTS_LIB "")
+ENDIF()
+
 CHECK_INCLUDE_FILES(stdbool.h HAVE_STDBOOL_H)
 CHECK_INCLUDE_FILES(strings.h HAVE_STRINGS_H)
 CHECK_INCLUDE_FILES(unistd.h HAVE_UNISTD_H)