diff --git a/Modules/CMakeCCompilerId.c.in b/Modules/CMakeCCompilerId.c.in
index cfa65c285..af5934978 100644
--- a/Modules/CMakeCCompilerId.c.in
+++ b/Modules/CMakeCCompilerId.c.in
@@ -28,6 +28,8 @@
 
 #elif defined(__WATCOMC__)
 # define COMPILER_ID "Watcom"
+# define COMPILER_VERSION_MAJOR DEC(__WATCOMC__ / 100)
+# define COMPILER_VERSION_MINOR DEC(__WATCOMC__ % 100)
 
 #elif defined(__SUNPRO_C)
 # define COMPILER_ID "SunPro"
diff --git a/Modules/CMakeCXXCompilerId.cpp.in b/Modules/CMakeCXXCompilerId.cpp.in
index 19fa7300c..d3fcc4b87 100644
--- a/Modules/CMakeCXXCompilerId.cpp.in
+++ b/Modules/CMakeCXXCompilerId.cpp.in
@@ -30,6 +30,8 @@
 
 #elif defined(__WATCOMC__)
 # define COMPILER_ID "Watcom"
+# define COMPILER_VERSION_MAJOR DEC(__WATCOMC__ / 100)
+# define COMPILER_VERSION_MINOR DEC(__WATCOMC__ % 100)
 
 #elif defined(__SUNPRO_CC)
 # define COMPILER_ID "SunPro"