diff --git a/Makefile.common b/Makefile.common
index f3085b9abf..d32048cbb4 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -379,7 +379,10 @@ HAVE_GTKPLUS = 0
 
 ifeq ($(HAVE_SSL), 1)
 DEFINES += -DHAVE_SSL
-DEFINES += -DMBEDTLS_SSL_DEBUG_ALL
+
+ifeq ($(DEBUG), 1)
+  DEFINES += -DMBEDTLS_SSL_DEBUG_ALL
+endif
 
 # MinGW requires this for some reason, even though the include paths are relative to the source
 INCLUDE_DIRS += -Ideps/mbedtls