libavogadro/src/extensions/crystallography/spglib/CMakeLists.txt | 2 +-
 libavogadro/src/extensions/swcntbuilder/tubegen/CMakeLists.txt   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavogadro/src/extensions/crystallography/spglib/CMakeLists.txt b/libavogadro/src/extensions/crystallography/spglib/CMakeLists.txt
index fb88316..2ddcfdf 100644
--- a/libavogadro/src/extensions/crystallography/spglib/CMakeLists.txt
+++ b/libavogadro/src/extensions/crystallography/spglib/CMakeLists.txt
@@ -20,6 +20,6 @@ add_library(spglib STATIC ${spglib_SRCS})
 set_target_properties(spglib PROPERTIES COMPILE_FLAGS "-w")
 
 # Set -fPIC on x86_64
-if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
+if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "^(i.86|x86|x86_64|ppc|ppc64)$")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC"  )
 endif()
diff --git a/libavogadro/src/extensions/swcntbuilder/tubegen/CMakeLists.txt b/libavogadro/src/extensions/swcntbuilder/tubegen/CMakeLists.txt
index 0cd0c3e..9e89daf 100644
--- a/libavogadro/src/extensions/swcntbuilder/tubegen/CMakeLists.txt
+++ b/libavogadro/src/extensions/swcntbuilder/tubegen/CMakeLists.txt
@@ -19,7 +19,7 @@ add_library(tubegen STATIC ${tubegen_SRCS})
 set_target_properties(tubegen PROPERTIES COMPILE_FLAGS "-w")
 
 # Set -fPIC on x86_64
-if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
+if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "^(i.86|x86|x86_64|ppc|ppc64)$")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC"  )
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC"  )
 endif()