diff --git a/ext/gsm/meson.build b/ext/gsm/meson.build
index a5ad2d4574..171891c7ef 100644
--- a/ext/gsm/meson.build
+++ b/ext/gsm/meson.build
@@ -5,7 +5,7 @@ endif
 gsm_dep = cc.find_library('gsm', required : get_option('gsm'))
 have_gsm_create = cc.has_header_symbol('gsm.h', 'gsm_create')
 if not have_gsm_create
-	have_gsm_create = cc.has_header_symbol('gsm/smg.h', 'gsm_create')
+  have_gsm_create = cc.has_header_symbol('gsm/gsm.h', 'gsm_create')
   if not have_gsm_create and get_option('gsm').enabled()
     error('GSM plugin is enabled: found libgsm but no headers')
   endif