diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87d0cb227..01ec7727e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -888,7 +888,7 @@ find_package (OpenMP)
 #
 # fftw3 single precision library
 #
-find_package (FFTW3 COMPONENTS double single threads REQUIRED)
+find_package (FFTW3 COMPONENTS single threads REQUIRED)
 
 #
 # libhamlib setup
@@ -1858,7 +1858,7 @@ set (CPACK_DEBIAN_PACKAGE_DEPENDS "libgfortran5 (>=10), libfftw3-single3 (>=3.3.
 set (CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
 
 set (CPACK_RPM_PACKAGE_ARCHITECTURE ${CMAKE_SYSTEM_PROCESSOR})
-set (CPACK_RPM_PACKAGE_REQUIRES "qt5-qtbase >= 5.13.2, qt5-qtserialport >= 5.13.2, qt5-qtmultimedia >= 5.13.2, qt5-qtsvg >= 5.13.2, libusbx >= 1.0.23, libgfortran >= 10.0.1, libgomp >= 10.0.1, fftw-libs-double > 3.3.8, fftw-libs-single > 3.3.8")
+set (CPACK_RPM_PACKAGE_REQUIRES "qt5-qtbase >= 5.13.2, qt5-qtserialport >= 5.13.2, qt5-qtmultimedia >= 5.13.2, qt5-qtsvg >= 5.13.2, libusbx >= 1.0.23, libgfortran >= 10.0.1, libgomp >= 10.0.1, fftw-libs-single >= 3.3.8")
 set (CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION /usr/share/pixmaps /usr/share/applications /usr/share/man /usr/share/man1)
 
 configure_file ("${PROJECT_SOURCE_DIR}/CMakeCPackOptions.cmake.in"
diff --git a/doc/user_guide/en/install-linux.adoc b/doc/user_guide/en/install-linux.adoc
index 0df12e5f5..ad905f32d 100644
--- a/doc/user_guide/en/install-linux.adoc
+++ b/doc/user_guide/en/install-linux.adoc
@@ -78,6 +78,6 @@ You may also need to execute the following command in a terminal:
 [example]
 ....
 sudo dnf install libgfortran fftw-libs-single qt5-qtbase \
-     qt5-qtmultimedia qt5-qtserialport fftw-libs-double \
-     qt5-qtsvg qt5-qtserialport libgomp libusbx
+     qt5-qtmultimedia qt5-qtserialport qt5-qtsvg \
+     qt5-qtserialport libgomp libusbx
 ....