diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31ee01ef..fb9d4b28 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -147,8 +147,14 @@ endif()
 # increment SOVERSION every time we increment the project major
 # version. This works because qpdf uses semantic versioning. qpdf 10.x
 # was libqpdf28, so start from there.
-math(EXPR qpdf_SOVERSION "${PROJECT_VERSION_MAJOR} + 18")
-set(qpdf_LIBVERSION ${qpdf_SOVERSION}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})
+
+if(FUTURE)
+  math(EXPR qpdf_SOVERSION 0)
+  set(qpdf_LIBVERSION 0)
+else()
+  math(EXPR qpdf_SOVERSION "${PROJECT_VERSION_MAJOR} + 18")
+  set(qpdf_LIBVERSION ${qpdf_SOVERSION}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})
+endif()
 
 if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
   message(FATAL_ERROR "
diff --git a/include/qpdf/DLL.h b/include/qpdf/DLL.h
index 6dd5137e..8279da03 100644
--- a/include/qpdf/DLL.h
+++ b/include/qpdf/DLL.h
@@ -27,7 +27,12 @@
 #define QPDF_MAJOR_VERSION 11
 #define QPDF_MINOR_VERSION 7
 #define QPDF_PATCH_VERSION 0
-#define QPDF_VERSION "11.7.0"
+
+#ifdef QPDF_FUTURE
+# define QPDF_VERSION "11.7.0+future"
+#else
+# define QPDF_VERSION "11.7.0"
+#endif
 
 /*
  * This file defines symbols that control the which functions,