diff --git a/awesomeConfig.cmake b/awesomeConfig.cmake
index 892b88e6..ea1d6057 100644
--- a/awesomeConfig.cmake
+++ b/awesomeConfig.cmake
@@ -158,8 +158,8 @@ set(AWESOME_DEPENDENCIES
 pkg_check_modules(AWESOME_REQUIRED REQUIRED ${AWESOME_DEPENDENCIES})
 
 # Check for backtrace_symbols()
-include(CheckFunctionExists)
-check_function_exists(backtrace_symbols HAS_EXECINFO)
+include(CheckSymbolExists)
+check_symbol_exists(backtrace_symbols execinfo.h HAS_EXECINFO)
 if(NOT HAS_EXECINFO)
     find_library(LIB_EXECINFO execinfo)
     if(LIB_EXECINFO)
@@ -176,11 +176,11 @@ else()
 endif()
 
 # Do we need libm for round()?
-check_function_exists(round HAS_ROUND_WITHOUT_LIBM)
+check_symbol_exists(round math.h HAS_ROUND_WITHOUT_LIBM)
 if(NOT HAS_ROUND_WITHOUT_LIBM)
     SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} m)
     set(AWESOME_REQUIRED_LDFLAGS ${AWESOME_REQUIRED_LDFLAGS} m)
-    check_function_exists(round HAS_ROUND_WITH_LIBM)
+    check_symbol_exists(round math.h HAS_ROUND_WITH_LIBM)
     if(NOT HAS_ROUND_WITH_LIBM)
         message(FATAL_ERROR "Did not find round()")
     endif()