diff --git a/cpu/cortex-m0_common/include/core_cm0.h b/cpu/cortex-m0_common/include/core_cm0.h
index 5186cb4838..87d8e32bc4 100644
--- a/cpu/cortex-m0_common/include/core_cm0.h
+++ b/cpu/cortex-m0_common/include/core_cm0.h
@@ -138,8 +138,8 @@
     #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
   #endif
 
-#elif defined ( __CSMC__ )		/* Cosmic */
-  #if ( __CSMC__ & 0x400)		// FPU present for parser
+#elif defined ( __CSMC__ )      /* Cosmic */
+  #if ( __CSMC__ & 0x400)       /* FPU present for parser */
     #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
   #endif
 #endif
diff --git a/cpu/cortex-m0_common/include/core_cm0plus.h b/cpu/cortex-m0_common/include/core_cm0plus.h
index 17e43984fc..bb2f8764ee 100644
--- a/cpu/cortex-m0_common/include/core_cm0plus.h
+++ b/cpu/cortex-m0_common/include/core_cm0plus.h
@@ -138,8 +138,8 @@
     #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
   #endif
 
-#elif defined ( __CSMC__ )		/* Cosmic */
-  #if ( __CSMC__ & 0x400)		// FPU present for parser
+#elif defined ( __CSMC__ )      /* Cosmic */
+  #if ( __CSMC__ & 0x400)       /* FPU present for parser */
     #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
   #endif
 #endif