diff --git a/src/lib_radare2.pri b/src/lib_radare2.pri
index 315f2320..f747c6ee 100644
--- a/src/lib_radare2.pri
+++ b/src/lib_radare2.pri
@@ -36,9 +36,9 @@ win32 {
         -lr_sdb
 } else {
     macx|bsd {
-        PREFIX=/usr/local
+        R2PREFIX=/usr/local
     } else {
-        PREFIX=/usr
+        R2PREFIX=/usr
     }
     USE_PKGCONFIG = 1
     R2_USER_PKGCONFIG = $$(HOME)/bin/prefix/radare2/lib/pkgconfig
@@ -47,23 +47,23 @@ win32 {
         PKG_CONFIG_PATH=$$PKG_CONFIG_PATH:$$R2_USER_PKGCONFIG
     } else {
         unix {
-            exists($$PREFIX/lib/pkgconfig/r_core.pc) {
-                PKG_CONFIG_PATH=$$PKG_CONFIG_PATH:$$PREFIX/lib/pkgconfig
+            exists($$R2PREFIX/lib/pkgconfig/r_core.pc) {
+                PKG_CONFIG_PATH=$$PKG_CONFIG_PATH:$$R2PREFIX/lib/pkgconfig
             } else {
-                LIBS += -L$$PREFIX/lib
-                R2_INCLUDEPATH += $$PREFIX/include/libr
+                LIBS += -L$$R2PREFIX/lib
+                R2_INCLUDEPATH += $$R2PREFIX/include/libr
                 USE_PKGCONFIG = 0
             }
         }
         macx {
-            LIBS += -L$$PREFIX/lib
-            R2_INCLUDEPATH += $$PREFIX/include/libr
+            LIBS += -L$$R2PREFIX/lib
+            R2_INCLUDEPATH += $$R2PREFIX/include/libr
             USE_PKGCONFIG = 0
         }
         bsd {
             !exists($$PKG_CONFIG_PATH/r_core.pc) {
-                LIBS += -L$$PREFIX/lib
-                R2_INCLUDEPATH += $$PREFIX/include/libr
+                LIBS += -L$$R2PREFIX/lib
+                R2_INCLUDEPATH += $$R2PREFIX/include/libr
                 USE_PKGCONFIG = 0
             }
         }