diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07c1238..13d5f40 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,7 +71,7 @@ endif()
 # check external libraries
 #variable_watch(fftw3f_INCLUDE_DIR)
 if (FIND_FFTW)
-    find_package(fftw3f)
+    find_package(FFTW3f CONFIG REQUIRED)
 endif()
 
 # cross-platform threads (e.g. thread.h for C11
@@ -466,8 +466,8 @@ foreach(target ${LIQUID_TARGETS})
         PROPERTIES
             PUBLIC_HEADER include/liquid.h)
     target_link_libraries(${target} c m)
-    if (fftw3f_FOUND)
-        target_link_libraries(${target} fftw3f)
+    if (FFTW3f_FOUND)
+        target_link_libraries(${target} FFTW3::fftw3f)
     endif()
 endforeach()
 
@@ -560,7 +560,7 @@ install(FILES
 # ---------------------------------------- pkg-config ----------------------------------------
 
 set(LIQUID_PC_LIBS_PRIVATE "")
-if (fftw3f_FOUND)
+if (FFTW3f_FOUND)
     string(APPEND LIQUID_PC_LIBS_PRIVATE " -lfftw3f")
 endif()