diff --git a/lldb/include/lldb/API/SBDefines.h b/lldb/include/lldb/API/SBDefines.h
--- a/lldb/include/lldb/API/SBDefines.h
+++ b/lldb/include/lldb/API/SBDefines.h
@@ -15,6 +15,16 @@
 #include "lldb/lldb-types.h"
 #include "lldb/lldb-versioning.h"
 
+#if defined(_WIN32)
+#if defined(LLDB_IN_LIBLLDB)
+#define LLDB_API __declspec(dllexport)
+#else
+#define LLDB_API __declspec(dllimport)
+#endif
+#else // defined (_WIN32)
+#define LLDB_API
+#endif
+
 // Forward Declarations
 namespace lldb {
 
diff --git a/lldb/include/lldb/lldb-defines.h b/lldb/include/lldb/lldb-defines.h
--- a/lldb/include/lldb/lldb-defines.h
+++ b/lldb/include/lldb/lldb-defines.h
@@ -11,18 +11,6 @@
 
 #include "lldb/lldb-types.h"
 
-#if defined(_WIN32)
-#if defined(EXPORT_LIBLLDB)
-#define LLDB_API __declspec(dllexport)
-#elif defined(IMPORT_LIBLLDB)
-#define LLDB_API __declspec(dllimport)
-#else
-#define LLDB_API
-#endif
-#else // defined (_WIN32)
-#define LLDB_API
-#endif
-
 #if !defined(INT32_MAX)
 #define INT32_MAX 2147483647
 #endif
diff --git a/lldb/source/API/CMakeLists.txt b/lldb/source/API/CMakeLists.txt
--- a/lldb/source/API/CMakeLists.txt
+++ b/lldb/source/API/CMakeLists.txt
@@ -1,7 +1,3 @@
-if ( CMAKE_SYSTEM_NAME MATCHES "Windows" )
-  add_definitions( -DEXPORT_LIBLLDB )
-endif()
-
 get_property(LLDB_ALL_PLUGINS GLOBAL PROPERTY LLDB_PLUGINS)
 
 if(LLDB_BUILD_FRAMEWORK)
@@ -165,6 +161,7 @@
   VERSION ${LLDB_VERSION}
 )
 
+target_compile_definitions(liblldb PRIVATE LLDB_IN_LIBLLDB)
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
   if (NOT LLDB_EXPORT_ALL_SYMBOLS)
     # If we're not exporting all symbols, we'll want to explicitly set
diff --git a/lldb/tools/driver/CMakeLists.txt b/lldb/tools/driver/CMakeLists.txt
--- a/lldb/tools/driver/CMakeLists.txt
+++ b/lldb/tools/driver/CMakeLists.txt
@@ -23,10 +23,6 @@
     Support
   )
 
-if ( CMAKE_SYSTEM_NAME MATCHES "Windows" )
-  add_definitions( -DIMPORT_LIBLLDB )
-endif()
-
 add_dependencies(lldb
   LLDBOptionsTableGen
   ${tablegen_deps}
diff --git a/lldb/tools/lldb-vscode/CMakeLists.txt b/lldb/tools/lldb-vscode/CMakeLists.txt
--- a/lldb/tools/lldb-vscode/CMakeLists.txt
+++ b/lldb/tools/lldb-vscode/CMakeLists.txt
@@ -1,5 +1,4 @@
 if ( CMAKE_SYSTEM_NAME MATCHES "Windows" OR CMAKE_SYSTEM_NAME MATCHES "NetBSD" )
-  add_definitions( -DIMPORT_LIBLLDB )
   list(APPEND extra_libs lldbHost)
 endif ()