diff --git a/CMakeLists.txt b/CMakeLists.txt
index 86530262..a17bd35a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -478,6 +478,7 @@ endif()
 set_target_properties(mdbx-static PROPERTIES
   C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON
   PUBLIC_HEADER mdbx.h)
+target_compile_definitions(mdbx-static PRIVATE MDBX_BUILD_SHARED_LIBRARY=0)
 target_setup_options(mdbx-static)
 libmdbx_setup_libs(mdbx-static INTERFACE)
 if(MDBX_BUILD_SHARED_LIBRARY)
@@ -494,7 +495,7 @@ if(MDBX_BUILD_SHARED_LIBRARY)
   set_target_properties(mdbx PROPERTIES
     C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON
     PUBLIC_HEADER mdbx.h)
-  target_compile_definitions(mdbx PRIVATE LIBMDBX_EXPORTS INTERFACE LIBMDBX_IMPORTS)
+  target_compile_definitions(mdbx PRIVATE LIBMDBX_EXPORTS MDBX_BUILD_SHARED_LIBRARY=1 INTERFACE LIBMDBX_IMPORTS)
   target_setup_options(mdbx)
   libmdbx_setup_libs(mdbx PRIVATE)
   if(CC_HAS_VISIBILITY AND (LTO_ENABLED OR INTERPROCEDURAL_OPTIMIZATION))
diff --git a/src/config.h.in b/src/config.h.in
index e6ae23e1..12f3dc63 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -17,7 +17,6 @@
 #ifndef MDBX_TXN_CHECKPID_AUTO
 #cmakedefine01 MDBX_TXN_CHECKPID
 #endif
-#cmakedefine01 MDBX_BUILD_SHARED_LIBRARY
 #cmakedefine MDBX_LOCKING_AUTO
 #ifndef MDBX_LOCKING_AUTO
 #cmakedefine MDBX_LOCKING @MDBX_LOCKING@