diff --git a/configure.ac b/configure.ac
index b60ca81..0d3874b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,7 @@ AC_CHECK_LIB(m, sqrt, [LIBS="$LIBS -lm"])
 dnl libmath (for rtl_power)
 AC_CHECK_LIB(m, atan2, [LIBS="$LIBS -lm"])
 
-dnl librealtime (for rtl_test)
+dnl librealtime (for rtl_test, rtl_fm)
 AC_CHECK_LIB(rt, clock_gettime, [LIBS="$LIBS -lrt"])
 
 # The following test is taken from WebKit's webkit.m4
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 77e1dc4..51d86f2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -112,13 +112,14 @@ target_link_libraries(rtl_power rtlsdr_shared convenience_static
     ${CMAKE_THREAD_LIBS_INIT}
 )
 if(UNIX)
-target_link_libraries(rtl_fm m)
 target_link_libraries(rtl_adsb m)
 target_link_libraries(rtl_power m)
 if(APPLE)
     target_link_libraries(rtl_test m)
+    target_link_libraries(rtl_fm m)
 else()
     target_link_libraries(rtl_test m rt)
+    target_link_libraries(rtl_fm m rt)
 endif()
 endif()