diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -115,8 +115,8 @@
 	# which is not widely distributed at the time of writing.
 	# FIXME: use the POSITION_INDEPENDENT_CODE property instead
 	if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-		add_compiler_flag(-fPIE)
-		add_linker_flag(-pie)
+		add_compiler_flags(-fPIE)
+		add_linker_flags(-pie)
 	else()
 		# MinGw provides its own libssp for stack smashing protection
 		link_libraries(ssp)