diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ce94440..b58b0ea 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -80,6 +80,31 @@ if(QZXING_USE_ENCODER)
     target_compile_definitions(qzxing PUBLIC -DENABLE_ENCODER_GENERIC -DENABLE_ENCODER_QR_CODE)
 endif(QZXING_USE_ENCODER)
 
+if(QZXING_USE_DECODER_QR_CODE)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_QR_CODE)
+endif()
+
+if(QZXING_USE_DECODER_1D_BARCODES)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_1D_BARCODES)
+endif()
+
+if(QZXING_USE_DECODER_DATA_MATRIX)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_DATA_MATRIX)
+endif()
+
+if(QZXING_USE_DECODER_AZTEC)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_AZTEC)
+endif()
+
+if(QZXING_USE_DECODER_PDF17)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_PDF17)
+endif()
+
+if(QZXING_USE_DECODER_1D_BARCODES)
+    target_compile_definitions(qzxing PRIVATE -DENABLE_DECODER_1D_BARCODES)
+endif()
+
+
 # Change Global Definitions depending on how you want to use the library
 target_compile_definitions(qzxing PUBLIC DISABLE_LIBRARY_FEATURES)