diff --git a/m b/m
index 1499a79..ce9ec47 100755
--- a/m
+++ b/m
@@ -60,7 +60,7 @@
 	CC=clang
 fi
 if [ -z ${CF+x} ]; then
-	CF="-D_FILE_OFFSET_BITS=64 -ferror-limit=2 -std=c99 -fpack-struct=1 -c"
+	CF="-D_FILE_OFFSET_BITS=64 -Isrc -ferror-limit=2 -std=c99 -fpack-struct=1 -c"
 fi
 
 if [ "$1" = "make" ]; then m_make $2 $3 $4 $5; exit; fi
diff --git a/m.cmd b/m.cmd
index bab703f..c1d5aa9 100644
--- a/m.cmd
+++ b/m.cmd
@@ -6,7 +6,7 @@
 IF /I "%1"=="tips" GOTO :TIPS
 
 IF NOT DEFINED CC SET CC=clang-cl
-IF NOT DEFINED CF SET CF=/Zp -D_CRT_SECURE_NO_WARNINGS -ferror-limit=2 -c
+IF NOT DEFINED CF SET CF=/Zp -D_CRT_SECURE_NO_WARNINGS -Isrc -ferror-limit=2 -c
 
 IF /I "%1"=="make" (
 	CALL :MAKE %2 %3 %4 %5