diff --git a/make/defs.mk b/make/defs.mk
index 02b2fb79..901cb7ea 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -271,7 +271,7 @@ LIB_SO                 = $(BUILD_LIBDIR)/$(LIBNAME).dll
 INSTALLED_LIB_SO       = $(INSTALL_LIBDIR)/$(LIBNAME).$(SO_SUFFIX)
 INSTALLED_LIB_A        = $(INSTALL_LIBDIR)/lib$(LIBNAME).a
 endif
-INSTALLED_DEF          = $(addprefix $(INSTALL_LIBDIR)/,$(wildcard *.lib *.def *.exp))
+INSTALLED_DEF          = $(addprefix $(INSTALL_LIBDIR)/,$(wildcard *.lib *.exp))
 INSTALLED_LIB         += $(addprefix $(INSTALL_LIBDIR)/,$(LOCAL_LIBS))
 BUILD_LIB             += $(addprefix $(BUILD_LIBDIR)/,$(LOCAL_LIBS))
 INSTALLED_SHOBJS      += $(addprefix $(INSTALL_LIBDIR)/,$(SHOBJS))