diff --git a/CMakeLists.txt b/CMakeLists.txt
index c32dc26..5822bad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -247,6 +247,11 @@ if(WIN32)
         _CRT_SECURE_NO_WARNINGS
         _CRT_NONSTDC_NO_WARNINGS
     )
+else()
+    target_compile_definitions(${EXECUTABLE_NAME} PRIVATE
+        $<$<CONFIG:Debug>:_DEBUG>
+        $<$<CONFIG:RelWithDebInfo>:_DEBUG>
+    )
 endif()
 
 if(WIN32)
diff --git a/src/debug.cc b/src/debug.cc
index b448310..810a487 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -142,7 +142,7 @@ int debugPrint(const char* format, ...)
 #ifdef _WIN32
         OutputDebugStringA(string);
 #else
-        printf(string);
+        printf("%s", string);
 #endif
 #endif
         rc = -1;