diff --git a/src/external/muparser/muparser.pc.in b/src/external/muparser/muparser.pc.in
index 646787cb53..9b97ad57f7 100644
--- a/src/external/muparser/muparser.pc.in
+++ b/src/external/muparser/muparser.pc.in
@@ -1,7 +1,5 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=${prefix}
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
 
 Name: @PACKAGE_NAME@
 Description: Mathematical expressions parser library
diff --git a/src/gromacs/libgromacs.pc.cmakein b/src/gromacs/libgromacs.pc.cmakein
index ec1ed6684e..ca1105474a 100644
--- a/src/gromacs/libgromacs.pc.cmakein
+++ b/src/gromacs/libgromacs.pc.cmakein
@@ -1,4 +1,4 @@
-libdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
 
 Name: libgromacs@GMX_LIBS_SUFFIX@
 Description: Gromacs library