diff --git a/meson.build b/meson.build
index c5cf9711..6585129c 100644
--- a/meson.build
+++ b/meson.build
@@ -25,7 +25,9 @@ project('unity', 'c',
 
 build_fixture = get_option('extension_fixture')
 build_memory = get_option('extension_memory')
+support_double = get_option('support_double')
 
+unity_args = []
 unity_src = []
 unity_inc = []
 
@@ -42,8 +44,13 @@ if build_memory
   subdir('extras/memory/src')
 endif
 
+if support_double
+  unity_args += '-DUNITY_INCLUDE_DOUBLE'
+endif
+
 unity_lib = static_library(meson.project_name(),
   sources: unity_src,
+  c_args: unity_args,
   include_directories: unity_inc,
   install: not meson.is_subproject(),
 )
diff --git a/meson_options.txt b/meson_options.txt
index fbb66d7e..7319a985 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,2 +1,3 @@
 option('extension_fixture', type: 'boolean', value: 'false', description: 'Whether to enable the fixture extension.')
 option('extension_memory', type: 'boolean', value: 'false', description: 'Whether to enable the memory extension.')
+option('support_double', type: 'boolean', value: 'false', description: 'Whether to enable double precision floating point assertion support.')