diff --git a/setup/compiler.class.inc.php b/setup/compiler.class.inc.php
index 574d15ab0..af63d4a7d 100644
--- a/setup/compiler.class.inc.php
+++ b/setup/compiler.class.inc.php
@@ -592,15 +592,18 @@ EOF;
 				{
 					// Write the code into the given module as model.<module>.php
 					//
-					$sResultFile = $sTempTargetDir.'/'.$sRelativeDir.'/model.'.$sModuleName.'.php';
+					$sModelFileName = 'model.'.$sModuleName.'.php';
+					$sResultFile = $sTempTargetDir.'/'.$sRelativeDir.'/'.$sModelFileName;
 					$this->WritePHPFile($sResultFile, $sModuleName, $sModuleVersion, $sCompiledCode);
+					// In case the model file wasn't present in the module file, we're adding it ! (N°4875)
+					$oModule->AddFileToInclude('business', $sModelFileName);
 				}
 				else
 				{
 					// Write the code into core/main.php
 					//
 					$this->sMainPHPCode .=
-					<<<EOF
+						<<<EOF
 /**
  * Data model from the delta file
  */
@@ -608,10 +611,8 @@ EOF;
 EOF;
 					$this->sMainPHPCode .= $sCompiledCode;
 				}
-			}
-			else
-			{
-					$this->Log("Compilation of module $sModuleName in version $sModuleVersion produced not code at all. No file written.");
+			} else {
+				$this->Log("Compilation of module $sModuleName in version $sModuleVersion produced not code at all. No file written.");
 			}
 
 			// files to include (PHP datamodels)
@@ -634,8 +635,7 @@ EOF;
 				}
 			}
 			// files to include (PHP webservices providers)
-			foreach($oModule->GetFilesToInclude('webservices') as $sRelFileName)
-			{
+			foreach ($oModule->GetFilesToInclude('webservices') as $sRelFileName) {
 				$aWebservicesFiles[] = "MetaModel::IncludeModule(MODULESROOT.'/$sRelativeDir/$sRelFileName');";
 			}
 		} // foreach module
diff --git a/setup/modelfactory.class.inc.php b/setup/modelfactory.class.inc.php
index 9d5eb6787..bdaf40ac5 100644
--- a/setup/modelfactory.class.inc.php
+++ b/setup/modelfactory.class.inc.php
@@ -328,6 +328,14 @@ class MFModule
 		return $this->aFilesToInclude[$sCategory];
 	}
 
+	public function AddFileToInclude($sCategory, $sFile)
+	{
+		if (in_array($sFile, $this->aFilesToInclude[$sCategory], true)) {
+			return;
+		}
+		$this->aFilesToInclude[$sCategory][] = $sFile;
+	}
+
 }
 
 /**
diff --git a/test/setup/SetupUtilsTest.php b/test/setup/SetupUtilsTest.php
index cb95fc68e..da1070c17 100644
--- a/test/setup/SetupUtilsTest.php
+++ b/test/setup/SetupUtilsTest.php
@@ -71,7 +71,7 @@ class SetupUtilsTest extends ItopTestCase
 				"/bin/ls",
 				self::WARNING,
 				"dot could not be executed (retcode=2): Please make sure it is installed and in the path",
-			]
+			],
 		];
 	}