diff --git a/pgsql/pc_pgsql.c b/pgsql/pc_pgsql.c
index 44a749f0..685836f0 100644
--- a/pgsql/pc_pgsql.c
+++ b/pgsql/pc_pgsql.c
@@ -908,7 +908,7 @@ pc_patch_wkb_set_double(uint8_t *wkb, double d)
 static uint8_t *
 pc_patch_wkb_set_int32(uint8_t *wkb, uint32_t i)
 {
-	memcpy(wkb, &i, 8);
+	memcpy(wkb, &i, 4);
 	wkb += 4;
 	return wkb;
 }
@@ -994,4 +994,4 @@ pc_patch_to_geometry_wkb_envelope(const SERIALIZED_PATCH *pa, const PCSCHEMA *sc
 
 	if ( wkbsize ) *wkbsize = size;
 	return wkb;
-}
\ No newline at end of file
+}