diff --git a/CMakeLists.txt b/CMakeLists.txt
index e54b644d..e8f4544f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ endif ()
 
 
 # Check if USB is on (to enable use "-DUSB=" argument of cmake)
-if (${USB})
+if (USB)
 	message(STATUS "Building with USB support")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_USB")
 	list(APPEND LIBS usb)
@@ -114,7 +114,7 @@ endif ()
 
 
 # Check if STL containers is on (to enable use "-DSTL=" argument of cmake)
-if (${STL})
+if (STL)
 	message(STATUS "Building with STL containers")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_CONTAINERS_STL")
 else ()
@@ -123,7 +123,7 @@ endif ()
 
 
 # Check if ICU used for PIString and PIChar
-if (${ICU})
+if (ICU)
 	message(STATUS "Building with ICU")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_ICU")
 	list(APPEND LIBS icuuc)
@@ -133,7 +133,7 @@ endif ()
 
 
 # Check if PIP support cryptographic encryption/decryption by using sodium library
-if (${CRYPT})
+if (CRYPT)
 	message(STATUS "Building with crypt support")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_CRYPT")
 	list(APPEND LIBS sodium)
@@ -143,7 +143,7 @@ endif ()
 
 
 # Check if PIP should be built with containers introspection
-if (${INTROSPECTION_CONTAINERS})
+if (INTROSPECTION_CONTAINERS)
 	message(STATUS "Building with containers introspection")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_INTROSPECTION_CONTAINERS")
 else ()
@@ -152,7 +152,7 @@ endif ()
 
 
 # Check if PIP should be built with threads introspection
-if (${INTROSPECTION_THREADS})
+if (INTROSPECTION_THREADS)
 	message(STATUS "Building with threads introspection")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DPIP_INTROSPECTION_THREADS")
 else ()