diff --git a/libwignernj.pc.in b/libwignernj.pc.in
index 7be95cd..ad1fbfa 100644
--- a/libwignernj.pc.in
+++ b/libwignernj.pc.in
@@ -2,8 +2,8 @@
 # Copyright (c) 2026 Susi Lehtola
 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=${prefix}
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=@CMAKE_INSTALL_LIBDIR@
+includedir=@CMAKE_INSTALL_INCLUDEDIR@
 
 Name: libwignernj
 Description: Exact Wigner 3j/6j/9j symbols and related coefficients via prime factorization
diff --git a/libwignernj_f03.pc.in b/libwignernj_f03.pc.in
index 0850d25..10d34e9 100644
--- a/libwignernj_f03.pc.in
+++ b/libwignernj_f03.pc.in
@@ -2,8 +2,8 @@
 # Copyright (c) 2026 Susi Lehtola
 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=${prefix}
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=@CMAKE_INSTALL_LIBDIR@
+includedir=@CMAKE_INSTALL_INCLUDEDIR@
 moddir=${includedir}/wignernj/fortran
 
 Name: libwignernj_f03