diff --git a/boards/arm/stm32/olimex-stm32-p407/src/olimex-stm32-p407.h b/boards/arm/stm32/olimex-stm32-p407/src/olimex-stm32-p407.h
index 32725132e0..f3abd4a97c 100644
--- a/boards/arm/stm32/olimex-stm32-p407/src/olimex-stm32-p407.h
+++ b/boards/arm/stm32/olimex-stm32-p407/src/olimex-stm32-p407.h
@@ -134,7 +134,7 @@
 
 /* Module symbol table */
 
-#if !defined(CONFIG_EXAMPLES_MODULE) || defined(CONFIG_BUILD_FLAT)
+#if !defined(CONFIG_EXAMPLES_MODULE) || !defined(CONFIG_BUILD_FLAT)
 #  undef HAVE_MODSYMS
 #endif