diff --git a/Make.inc b/Make.inc
index 64cdc5b..22ed829 100644
--- a/Make.inc
+++ b/Make.inc
@@ -69,28 +69,29 @@ override OS=WINNT
 endif
 #keep these if statements these separate
 ifeq ($(OS), WINNT)
+SHLIB_EXT = dll
+SONAME_FLAG = -soname
 CFLAGS_add+=-nodefaultlibs
 FFLAGS+=-nodefaultlibs
 endif
 
 ifeq ($(OS), Linux)
 SHLIB_EXT = so
+SONAME_FLAG = -soname
 CFLAGS_add+=-fPIC
 FFLAGS+=-fPIC
 endif
 
 ifeq ($(OS), FreeBSD)
 SHLIB_EXT = so
+SONAME_FLAG = -soname
 CFLAGS_add+=-fPIC
 FFLAGS+=-fPIC
 endif
 
 ifeq ($(OS), Darwin)
 SHLIB_EXT = dylib
+SONAME_FLAG = -install_name
 CFLAGS_add+=-fPIC
 FFLAGS+=-fPIC
 endif
-
-ifeq ($(OS), WINNT)
-SHLIB_EXT = dll
-endif
diff --git a/Makefile b/Makefile
index 0db517b..4268453 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ all: libopenlibm.a libopenlibm.$(SHLIB_EXT)
 libopenlibm.a: $(OBJS)  
 	$(AR) -rcs libopenlibm.a $(OBJS)
 libopenlibm.$(SHLIB_EXT): $(OBJS)
-	$(FC) -shared $(OBJS) $(LDFLAGS) -o libopenlibm.$(SHLIB_EXT).$(VERSION)
+	$(FC) -shared $(OBJS) $(LDFLAGS) -Wl,$(SONAME_FLAG),libopenlibm.$(SHLIB_EXT).$(VERSION) -o libopenlibm.$(SHLIB_EXT).$(VERSION)
 	ln -s libopenlibm.$(SHLIB_EXT).$(VERSION) libopenlibm.$(SHLIB_EXT).$(word 1,$(VERSION_SPLIT)).$(word 2,$(VERSION_SPLIT))
 	ln -s libopenlibm.$(SHLIB_EXT).$(VERSION) libopenlibm.$(SHLIB_EXT).$(word 1,$(VERSION_SPLIT))
 	ln -s libopenlibm.$(SHLIB_EXT).$(VERSION) libopenlibm.$(SHLIB_EXT)