diff -up synthv1-0.3.0/src/src_lv2.pro.64bitarchs synthv1-0.3.0/src/src_lv2.pro
--- synthv1-0.3.0/src/src_lv2.pro.64bitarchs	2013-02-22 23:07:22.254606117 +0100
+++ synthv1-0.3.0/src/src_lv2.pro	2013-02-22 23:11:34.421606876 +0100
@@ -62,7 +62,15 @@ unix {
 		contains(ARCH, x86_64) {
 			LV2DIR = $${PREFIX}/lib64/lv2
 		} else {
-			LV2DIR = $${PREFIX}/lib/lv2
+			contains(ARCH, s390x) {
+				LV2DIR = $${PREFIX}/lib64/lv2
+			} else {
+				contains(ARCH, ppc64) {
+					LV2DIR = $${PREFIX}/lib64/lv2
+			       } else {
+					LV2DIR = $${PREFIX}/lib/lv2
+				}
+			}
 		}
 	}