diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf72ead3b..d5a6f4c9c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,9 +36,27 @@ set(CUSTOM_COMPILE_OPTIONS
 set(FN_PREFIX "FW${PROJECT_VERSION}+${PROJECT_VERSION_SUFFIX}")
 
 # Inform user about the resolved settings
-message(STATUS "Project version ...........: ${PROJECT_VERSION}")
-message(STATUS "Project version suffix ....: ${PROJECT_VERSION_SUFFIX}")
-message(STATUS "Project version description: ${PROJECT_VERSION_FULL}")
+message(STATUS "Project version (Configuration.h): ${PROJECT_VERSION}")
+message(STATUS "Project version suffix ..........: ${PROJECT_VERSION_SUFFIX}")
+message(STATUS "Project version description......: ${PROJECT_VERSION_FULL}")
+message(STATUS "PROJECT() VERSION argument.......: ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_REV}")
+
+
+string(REGEX MATCH "v([0-9]+)\.([0-9]+)\.([0-9]+)" TAG_VERSION "${FW_COMMIT_DSC}")
+
+if(NOT ${CMAKE_MATCH_1} STREQUAL ${PROJECT_VERSION_MAJOR})
+    message(FATAL_ERROR "Major version of current tag disagrees with Configuration.h ${CMAKE_MATCH_1}!=${PROJECT_VERSION_MAJOR}")
+endif()
+
+if(NOT ${CMAKE_MATCH_2} STREQUAL ${PROJECT_VERSION_MINOR})
+    message(FATAL_ERROR "Minor version of current tag disagrees with Configuration.h ${CMAKE_MATCH_2}!=${PROJECT_VERSION_MINOR}")
+endif()
+
+if(NOT ${CMAKE_MATCH_3} STREQUAL ${PROJECT_VERSION_REV})
+    message(FATAL_ERROR "Rev version of current tag disagrees with Configuration.h ${CMAKE_MATCH_3}!=${PROJECT_VERSION_REV}")
+endif()
+
+MESSAGE(STATUS "Configuration.h and tag match: OK (${PROJECT_VERSION}/${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3})")
 
 # Language configuration
 set(MAIN_LANGUAGES
@@ -58,7 +76,7 @@ set(COMMUNITY_LANGUAGES
 set(SELECTED_LANGUAGES ${MAIN_LANGUAGES} ${COMMUNITY_LANGUAGES})
 
 get_dependency_directory(prusa3dboards PRUSA_BOARDS_DIR)
-project(Prusa-Firmware)
+project(Prusa-Firmware VERSION ${PROJECT_VERSION})
 add_subdirectory(lib)
 
 # Get LANG_MAX_SIZE from sources
@@ -314,6 +332,9 @@ function(add_base_binary variant_name)
     ${variant_name}
     PRIVATE CMAKE_CONTROL FW_REPOSITORY="${PROJECT_REPOSITORY}"
             FW_VERSION_FULL="${PROJECT_VERSION_FULL}" FW_COMMIT_HASH=0x${FW_COMMIT_HASH}
+            FW_MAJOR=${PROJECT_VERSION_MAJOR}
+            FW_MINOR=${PROJECT_VERSION_MINOR}
+            FW_REVISION=${PROJECT_VERSION_REV}
     )
 endfunction()
 
@@ -500,7 +521,7 @@ if(CMAKE_CROSSCOMPILING)
     set(DIR_NAME ${THIS_VAR})
     file(MAKE_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/build_gen/${DIR_NAME})
     file(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/build_gen/${DIR_NAME}/CMakeLists.txt
-         "project(${DIR_NAME})\nfw_add_variant(${THIS_VAR})"
+         "project(${DIR_NAME} VERSION ${PROJECT_VERSION})\nfw_add_variant(${THIS_VAR})"
          )
     add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/build_gen/${DIR_NAME})
   endforeach(THIS_VAR IN LISTS FW_VARIANTS)
diff --git a/Firmware/Configuration.h b/Firmware/Configuration.h
index d6973dc48..6a44e9fc8 100644
--- a/Firmware/Configuration.h
+++ b/Firmware/Configuration.h
@@ -12,12 +12,20 @@ extern const char _sPrinterName[] PROGMEM;
 extern const uint16_t _nPrinterMmuType;
 extern const char _sPrinterMmuName[] PROGMEM;
 
-// Firmware version
+// Firmware version.
+// NOTE: These are ONLY used if you are not building via cmake and/or not in a git repository.
+// Otherwise the repository information takes precedence.
+#ifndef CMAKE_CONTROL
 #define FW_MAJOR 3
 #define FW_MINOR 13
-#define FW_REVISION 1
+#define FW_REVISION 0
+#warning "** Not sure why I had to touch this, but it seems like v3.13.1 is not in the linear history of this branch yet?"
+#endif
+
 #define FW_FLAVOR RC      //uncomment if DEBUG, DEVEL, ALPHA, BETA or RC
 #define FW_FLAVERSION 1     //uncomment if FW_FLAVOR is defined and versioning is needed. Limited to max 8.
+#warning "^^^These are temporary and need to be provided by cmake"
+
 #ifndef FW_FLAVOR
     #define FW_VERSION STR(FW_MAJOR) "." STR(FW_MINOR) "." STR(FW_REVISION)
 #else
diff --git a/Firmware/util.cpp b/Firmware/util.cpp
index ea24bac89..63cf34075 100644
--- a/Firmware/util.cpp
+++ b/Firmware/util.cpp
@@ -15,8 +15,11 @@ const uint16_t FW_VERSION_NR[4] PROGMEM = {
     FW_MINOR,
     FW_REVISION,
 (uint16_t)(FW_COMMIT_HASH) // explicitly truncate the hash to fit
+#warning "^^^ this is wrong and needs fixing. Should it be build nr or the flavour?"
 };
 
+const uint32_t FW_VERSION_HASH PROGMEM = FW_COMMIT_HASH;
+
 const char* FW_VERSION_STR_P()
 {
     return FW_VERSION_STR;
@@ -147,7 +150,7 @@ inline bool strncmp_PP(const char *p1, const char *p2, uint8_t n)
 				return -1;
 			if (pgm_read_byte(p1) > pgm_read_byte(p2))
 				return 1;
-		}            
+		}
     }
     return 0;
 }
diff --git a/Firmware/util.h b/Firmware/util.h
index 0fcf76824..ee5748578 100644
--- a/Firmware/util.h
+++ b/Firmware/util.h
@@ -4,6 +4,9 @@
 extern const uint16_t FW_VERSION_NR[4];
 extern const char* FW_VERSION_STR_P();
 
+extern const uint32_t FW_VERSION_HASH PROGMEM;
+static inline uint32_t FW_VERSION_HASH_P() { return (uint32_t)pgm_read_dword(&FW_VERSION_HASH); }
+
 // Definition of a firmware flavor numerical values.
 // To keep it short as possible
 // DEVs/ALPHAs/BETAs limited to max 8 flavor versions
diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake
index f9db917e8..aa0755de1 100644
--- a/cmake/GetGitRevisionDescription.cmake
+++ b/cmake/GetGitRevisionDescription.cmake
@@ -189,7 +189,7 @@ function(git_describe _var)
     endif()
     if(NOT hash)
         set(${_var}
-            "HEAD-HASH-NOTFOUND"
+            "0" # This is an integer in the code...
             PARENT_SCOPE)
         return()
     endif()