diff --git a/src/core-utils/core-utils.i b/src/core-utils/core-utils.i
index 77c05fb1c2..ca200f4df3 100644
--- a/src/core-utils/core-utils.i
+++ b/src/core-utils/core-utils.i
@@ -77,6 +77,6 @@ const char * gnc_locale_default_iso_currency_code (void);
     return gnc_utf8_validate(str, -1, 0);
   }
 %}
-#elsif defined(SWIGPYTHON)
+#elif defined(SWIGPYTHON)
 gboolean gnc_utf8_validate(const gchar *, gssize, const gchar**);
 #endif
diff --git a/src/engine/business-core.i b/src/engine/business-core.i
index f7331fda48..54634616a0 100644
--- a/src/engine/business-core.i
+++ b/src/engine/business-core.i
@@ -166,7 +166,7 @@ static GncInvoiceList * qof_query_run_for_invoices(QofQuery *q) {
     SET_ENUM("GNC-INVOICE-VEND-CREDIT-NOTE");
     SET_ENUM("GNC-INVOICE-EMPL-CREDIT-NOTE");
 
-#undefine SET_ENUM
+#undef SET_ENUM
   }
 
 }
diff --git a/src/engine/engine.i b/src/engine/engine.i
index 49cfc23c82..99a1039069 100644
--- a/src/engine/engine.i
+++ b/src/engine/engine.i
@@ -355,7 +355,7 @@ KvpValue * kvp_frame_get_slot_path_gslist (KvpFrame *frame, GSList *key_path);
     SET_ENUM("GNC-HOW-RND-ROUND");
     SET_ENUM("GNC-HOW-RND-NEVER");
 
-#undefine SET_ENUM
+#undef SET_ENUM
   }
 
 }
diff --git a/src/html/gnc-html.i b/src/html/gnc-html.i
index d29558d8d8..3c02009675 100644
--- a/src/html/gnc-html.i
+++ b/src/html/gnc-html.i
@@ -51,7 +51,7 @@ SCM scm_init_sw_gnc_html_module(void);
     SET_ENUM("URL-TYPE-PRICE");
     SET_ENUM("URL-TYPE-OTHER");
 
-#undefine SET_ENUM
+#undef SET_ENUM
   }
 
 }