diff --git a/src/projectM-engine/CMakeLists.txt b/src/projectM-engine/CMakeLists.txt
index 600a27937..eb8aec397 100644
--- a/src/projectM-engine/CMakeLists.txt
+++ b/src/projectM-engine/CMakeLists.txt
@@ -59,7 +59,11 @@ SET_TARGET_PROPERTIES(projectM PROPERTIES VERSION 2.00 SOVERSION 2)
 if (APPLE)
 ADD_DEFINITIONS(-DMACOS -DSTBI_NO_DDS -DUSE_THREADS)
 else (APPLE)
+if (WIN32)
+ADD_DEFINITIONS(-DWIN32 -DSTBI_NO_DDS -DUSE_THREADS)
+else(WIN32)
 ADD_DEFINITIONS(-DLINUX -DSTBI_NO_DDS -DUSE_THREADS)
+endif(WIN32)
 endif(APPLE)
 
 ADD_DEFINITIONS(-DCMAKE_INSTALL_PREFIX="\\\"${CMAKE_INSTALL_PREFIX}\\\"")