diff --git a/cli/Makefile b/cli/Makefile
index 23a93c1f..83a9da59 100644
--- a/cli/Makefile
+++ b/cli/Makefile
@@ -18,7 +18,7 @@ ifeq ($(TARGET_OS),Windows_NT)
   CFLAGS += -DWIN32
 endif
 
-CFLAGS += -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -O3 -DVAR_ARRAYS -I../ext_includes $(EXTRA_CFLAGS)
+CFLAGS += -ffast-math -O3 -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -DVAR_ARRAYS -I../ext_includes $(EXTRA_CFLAGS)
 LDFLAGS += -L../src -L../ext_libs -lvgmstream $(EXTRA_LDFLAGS) -lm
 TARGET_EXT_LIBS = 
 
diff --git a/winamp/Makefile b/winamp/Makefile
index d936f5f1..619a29f3 100644
--- a/winamp/Makefile
+++ b/winamp/Makefile
@@ -15,7 +15,7 @@ endif
 ### main defs
 OUTPUT_WINAMP = in_vgmstream.dll
 
-CFLAGS += -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -O3 -DUSE_ALLOCA -DWIN32 -I../ext_includes $(EXTRA_CFLAGS)
+CFLAGS += -ffast-math -O3 -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -DUSE_ALLOCA -DWIN32 -I../ext_includes $(EXTRA_CFLAGS)
 LDFLAGS += -L../src -L../ext_libs -lm -lvgmstream $(EXTRA_LDFLAGS)
 TARGET_EXT_LIBS = 
 
diff --git a/xmplay/Makefile b/xmplay/Makefile
index 0abd7ae4..be78a3fc 100644
--- a/xmplay/Makefile
+++ b/xmplay/Makefile
@@ -15,7 +15,7 @@ endif
 ### main defs
 OUTPUT_XMPLAY = xmp-vgmstream.dll
 
-CFLAGS += -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -O3 -DUSE_ALLOCA -DWIN32 -I../ext_includes $(EXTRA_CFLAGS)
+CFLAGS += -ffast-math -O3 -Wall -Werror=format-security -Wdeclaration-after-statement -Wvla -DUSE_ALLOCA -DWIN32 -I../ext_includes $(EXTRA_CFLAGS)
 LDFLAGS += -L../src -L../ext_libs -lm -lvgmstream $(EXTRA_LDFLAGS)
 TARGET_EXT_LIBS =