diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
index 0016ca4c..e23d0f23 100644
--- a/src/tools/CMakeLists.txt
+++ b/src/tools/CMakeLists.txt
@@ -32,6 +32,9 @@ IF (CARES_BUILD_TOOLS)
 
 	# Build adig
 	ADD_EXECUTABLE (adig adig.c ${SAMPLESOURCES})
+	# Don't build adig and ahost in parallel.  This is to prevent a Windows MSVC
+	# build error due to them both using the same source files.
+	ADD_DEPENDENCIES(adig ahost)
 	TARGET_INCLUDE_DIRECTORIES (adig
 		PUBLIC "$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>"
 		       "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>"