diff --git a/code/OpenGEXImporter.cpp b/code/OpenGEXImporter.cpp
index 025356c1d..5448edba5 100644
--- a/code/OpenGEXImporter.cpp
+++ b/code/OpenGEXImporter.cpp
@@ -778,10 +778,22 @@ static void fillColor4( aiColor4D *col4, Value *vals ) {
     Value *next( vals );
     col4->r = next->getFloat();
     next = next->m_next;
+    if (!next) {
+        throw DeadlyImportError( "OpenGEX: Not enough values to fill 4-element color, only 1" );
+    }
+
     col4->g = next->getFloat();
     next = next->m_next;
+    if (!next) {
+        throw DeadlyImportError( "OpenGEX: Not enough values to fill 4-element color, only 2" );
+    }
+
     col4->b = next->getFloat();
     next = next->m_next;
+    if (!next) {
+        throw DeadlyImportError( "OpenGEX: Not enough values to fill 4-element color, only 3" );
+    }
+
     col4->a = next->getFloat();
 }