diff --git a/Makefile.defs b/Makefile.defs
index 37e35f6f7..16d5ec9e5 100644
--- a/Makefile.defs
+++ b/Makefile.defs
@@ -44,17 +44,17 @@ platform = $(shell uname)
 DETECTED_OS=$(platform)
 
 ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
-DETECTED_COMPILER = clang
+  DETECTED_COMPILER = clang
 else
-DETECTED_COMPILER = gcc
+  DETECTED_COMPILER = gcc
 endif
 
 ifeq ($(platform),Darwin)
-    AR= /usr/bin/ar rcs
-    RANLIB= /usr/bin/ranlib
+  AR= /usr/bin/ar rcs
+  RANLIB= /usr/bin/ranlib
 else
-    AR= ar rcs
-    RANLIB= ranlib
+  AR= ar rcs
+  RANLIB= ranlib
 endif
 
 ifeq ($(DEBUG),1)
@@ -82,13 +82,13 @@ DEFCFLAGS += -Wswitch-enum -Wno-error=switch-enum
 ifeq ($(shell expr $(CC_VERSION) \>= 10), 1)
   ifneq ($(DETECTED_COMPILER), clang)
     DEFCFLAGS += -Wno-stringop-overflow -Wno-error=stringop-overflow
-	endif
+  endif
 endif
 ifeq ($(platform),Darwin)
-# their readline has strict-prototype issues
-DEFCFLAGS += -Wno-strict-prototypes
+  # their readline has strict-prototype issues
+  DEFCFLAGS += -Wno-strict-prototypes
 else
-DEFCFLAGS += -Wstrict-prototypes
+  DEFCFLAGS += -Wstrict-prototypes
 endif
 
 # Next ones are activated only if GCCEXTRA=1 or CLANGEXTRA=1