diff --git a/core/combo/arch/mips/mips32r2-fp.mk b/core/combo/arch/mips/mips32r2-fp.mk
index a407f0035..08d91dfac 100644
--- a/core/combo/arch/mips/mips32r2-fp.mk
+++ b/core/combo/arch/mips/mips32r2-fp.mk
@@ -8,7 +8,8 @@ arch_variant_cflags := \
     -march=mips32r2 \
     -mtune=mips32r2 \
     -mips32r2 \
-    -mhard-float
+    -mhard-float \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/combo/arch/mips/mips32r2.mk b/core/combo/arch/mips/mips32r2.mk
index 369d49981..16ce76f9e 100644
--- a/core/combo/arch/mips/mips32r2.mk
+++ b/core/combo/arch/mips/mips32r2.mk
@@ -6,7 +6,8 @@ arch_variant_cflags := \
     -march=mips32r2 \
     -mtune=mips32r2 \
     -mips32r2 \
-    -msoft-float
+    -msoft-float \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/combo/arch/mips/mips32r2dsp-fp.mk b/core/combo/arch/mips/mips32r2dsp-fp.mk
index 886872d51..fe2b1feb7 100644
--- a/core/combo/arch/mips/mips32r2dsp-fp.mk
+++ b/core/combo/arch/mips/mips32r2dsp-fp.mk
@@ -11,7 +11,8 @@ arch_variant_cflags := \
     -mtune=mips32r2 \
     -mips32r2 \
     -mhard-float \
-    -mdsp
+    -mdsp \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/combo/arch/mips/mips32r2dsp.mk b/core/combo/arch/mips/mips32r2dsp.mk
index e67adc7e4..8a8976ca6 100644
--- a/core/combo/arch/mips/mips32r2dsp.mk
+++ b/core/combo/arch/mips/mips32r2dsp.mk
@@ -10,7 +10,8 @@ arch_variant_cflags := \
     -mtune=mips32r2 \
     -mips32r2 \
     -msoft-float \
-    -mdsp
+    -mdsp \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/combo/arch/mips/mips32r2dspr2-fp.mk b/core/combo/arch/mips/mips32r2dspr2-fp.mk
index 27e090dd8..7e882b34e 100644
--- a/core/combo/arch/mips/mips32r2dspr2-fp.mk
+++ b/core/combo/arch/mips/mips32r2dspr2-fp.mk
@@ -11,7 +11,8 @@ arch_variant_cflags := \
     -mtune=mips32r2 \
     -mips32r2 \
     -mhard-float \
-    -mdspr2
+    -mdspr2 \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/combo/arch/mips/mips32r2dspr2.mk b/core/combo/arch/mips/mips32r2dspr2.mk
index c493d9a88..c311523f0 100644
--- a/core/combo/arch/mips/mips32r2dspr2.mk
+++ b/core/combo/arch/mips/mips32r2dspr2.mk
@@ -10,7 +10,8 @@ arch_variant_cflags := \
     -mtune=mips32r2 \
     -mips32r2 \
     -msoft-float \
-    -mdspr2
+    -mdspr2 \
+    -msynci
 
 arch_variant_ldflags := \
     -EL
diff --git a/core/llvm_config.mk b/core/llvm_config.mk
index 0308b282e..7a26842e9 100644
--- a/core/llvm_config.mk
+++ b/core/llvm_config.mk
@@ -59,7 +59,8 @@ ifeq ($(TARGET_ARCH),mips)
     -march=mips32r2 \
     -mtune=mips32r2 \
     -march=mips32 \
-    -mtune=mips32
+    -mtune=mips32 \
+    -msynci
 endif
 ifeq ($(TARGET_ARCH),x86)
   CLANG_CONFIG_EXTRA_CFLAGS += \