diff --git a/moo/lib/Makefile.am b/moo/lib/Makefile.am
index 92787ff..bbaea62 100644
--- a/moo/lib/Makefile.am
+++ b/moo/lib/Makefile.am
@@ -38,7 +38,7 @@ CPPFLAGS_LIB_COMMON += -DMOO_DEFAULT_PFMODPREFIX=\"libmoo-\" -DMOO_DEFAULT_PFMOD
 else
 CPPFLAGS_LIB_COMMON += -DMOO_DEFAULT_PFMODPREFIX=\"$(libdir)/libmoo-\" 
 if MACOSX
-CPPFLAGS_LIB_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".dynlib\"
+CPPFLAGS_LIB_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".dylib\"
 else
 CPPFLAGS_LIB_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".so\"
 endif
diff --git a/moo/lib/Makefile.in b/moo/lib/Makefile.in
index d1986fc..eb0ca99 100644
--- a/moo/lib/Makefile.in
+++ b/moo/lib/Makefile.in
@@ -96,7 +96,7 @@ host_triplet = @host@
 # to the first number in -version-info above
 @WIN32_TRUE@am__append_4 = -DMOO_DEFAULT_PFMODPREFIX=\"libmoo-\" -DMOO_DEFAULT_PFMODPOSTFIX=\"-1.dll\"
 @WIN32_FALSE@am__append_5 = -DMOO_DEFAULT_PFMODPREFIX=\"$(libdir)/libmoo-\" 
-@MACOSX_TRUE@@WIN32_FALSE@am__append_6 = -DMOO_DEFAULT_PFMODPOSTFIX=\".dynlib\"
+@MACOSX_TRUE@@WIN32_FALSE@am__append_6 = -DMOO_DEFAULT_PFMODPOSTFIX=\".dylib\"
 @MACOSX_FALSE@@WIN32_FALSE@am__append_7 = -DMOO_DEFAULT_PFMODPOSTFIX=\".so\"
 @ENABLE_STATIC_MODULE_TRUE@am__append_8 = -lmoo-stdio
 @ENABLE_STATIC_MODULE_FALSE@libmoo_la_DEPENDENCIES =  \
diff --git a/moo/mod/Makefile.am b/moo/mod/Makefile.am
index 10e9144..ee8fb61 100644
--- a/moo/mod/Makefile.am
+++ b/moo/mod/Makefile.am
@@ -16,7 +16,7 @@ CPPFLAGS_COMMON += -DMOO_DEFAULT_PFMODPREFIX=\"libmoo-\" -DMOO_DEFAULT_PFMODPOST
 else
 CPPFLAGS_COMMON += -DMOO_DEFAULT_PFMODPREFIX=\"$(libdir)/libmoo-\" 
 if MACOSX
-CPPFLAGS_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".dynlib\"
+CPPFLAGS_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".dylib\"
 else
 CPPFLAGS_COMMON += -DMOO_DEFAULT_PFMODPOSTFIX=\".so\"
 endif
diff --git a/moo/mod/Makefile.in b/moo/mod/Makefile.in
index 400a3a8..f144e9d 100644
--- a/moo/mod/Makefile.in
+++ b/moo/mod/Makefile.in
@@ -93,7 +93,7 @@ host_triplet = @host@
 # to the first number in -version-info above
 @WIN32_TRUE@am__append_1 = -DMOO_DEFAULT_PFMODPREFIX=\"libmoo-\" -DMOO_DEFAULT_PFMODPOSTFIX=\"-1.dll\"
 @WIN32_FALSE@am__append_2 = -DMOO_DEFAULT_PFMODPREFIX=\"$(libdir)/libmoo-\" 
-@MACOSX_TRUE@@WIN32_FALSE@am__append_3 = -DMOO_DEFAULT_PFMODPOSTFIX=\".dynlib\"
+@MACOSX_TRUE@@WIN32_FALSE@am__append_3 = -DMOO_DEFAULT_PFMODPOSTFIX=\".dylib\"
 @MACOSX_FALSE@@WIN32_FALSE@am__append_4 = -DMOO_DEFAULT_PFMODPOSTFIX=\".so\"
 @ENABLE_MOD_CON_TRUE@@ENABLE_STATIC_MODULE_TRUE@am__append_5 = libmoo-con.la
 @ENABLE_MOD_FFI_TRUE@@ENABLE_STATIC_MODULE_TRUE@am__append_6 = libmoo-ffi.la