diff --git a/src/include/ngspice/sharedspice.h b/src/include/ngspice/sharedspice.h
index 074716da1..72269c3b3 100644
--- a/src/include/ngspice/sharedspice.h
+++ b/src/include/ngspice/sharedspice.h
@@ -92,7 +92,7 @@ are of type bool if sharedspice.h is used externally.
 */
 
 #ifndef NGSPICE_PACKAGE_VERSION
-#define NGSPICE_PACKAGE_VERSION "36"
+#define NGSPICE_PACKAGE_VERSION "36+"
 #endif
 /* we have NG_BOOL instead of BOOL */
 #ifndef HAS_NG_BOOL